How to annoy your older sister.

How do you really p/o your older sister?

hide her things/ trouble her things

Don't let them bother you. When you start giving in to your temper, your sibling assumes that his taunting is working. This will just make them even more annoying and mean- and give them a feeling of victory! If you just ignore them, they will get discouraged and leave you alone.
Try to avoid sticky situations. If you want a certain pen and your sister or brother wants the same one, let them have it. This will show that you are more mature and that you don't seem to care (even if you do!). Also, don't provoke them- you want to make them leave you alone, not try to retaliate!
Come up with smart come-backs. (No, not 'I'm rubber and you're glue...) I mean say your sibling says that you are the ugliest person they've ever seen. To make a quick and cool come-back, say to them, Hey, you know what? There's a mirror right over there. Check back later. This will stump them and they will have nothing else to say. Also, if you really don't care about getting even (or if a friend is teasing you), just sort of stare at them with a skeptical look or shrug it off and go back to what you were doing.
Keep your cool. If you get riled up they will just know that they are really getting to you. If you act calmly they will be surprised and they will stop annoying you quicker.
Be the mature one. Do what ever you have to do to just show your sibling that their cruelness doesn't matter to you.
If they try to make fun of you without evidence to back it up or that is meaningless, like you're stupid or loser then attack them with their more embarrassing or lesser qualities. This is especially effective when others are around. Example: Remember that time when you went to the dance at school with Emily and you had diarrhea, and when you came back your pants were dripping. Details magnify effect.
Tie your brother/sister's pajama leg together. When they get their pajamas on, they'll fall down with a thud.
If you sleep in the same room in a bunk bed, without being seen...poke them. Do this a few times, then, purposely, get caught. It will annoy them more if they know it's you.
Sneak up on them and scare them when they do not expect it.
Get some saran wrap and wait till your sibling has to pee. Wrap the saran wrap under the toilet seat. Then wait...
Play shadow and repeat every word your sibling says.
Take something of theirs and hide it. Make sure it is something they really like a lot. The more they like the item, the more annoyed they'll be.
Watch a TV show they can't stand.
Learn a foreign language that they don't know and start insulting them in it. Make sure your parents don't know the language. To make it easier, don't only learn bad words, insult, curse words, or curse phrases.
Speak a foreign language every day, it may be hard to actually learn it, but it sure pays off.
Or you can just say Hi, your name is name or some other random phrase, and make them think you are insulting them! Then, after they beg you (or tell on you), you can tell them what it really means!
Another proven method is to call them benevolent, which means nice. After they disagree and you tell them what it really means, continue this a few days, and one day change benevolent to malevolent.
Make up your own language and start insulting them in it. Make sure it is hard to understand. If they understand it then they can tell your parents.
Stay on the computer all day long. They love to use computers and they will get bored, especially if the computer has Internet.
If they are on the computer all day long, and they like to use the Internet you can unplug, the modem and plug it back in, or find another way to get the internet down such as making a call (if you have dial up) or using a cordless phone (for some wireless connections) Works like a charm, just don't get caught...
Memorize the lines to a movie they love and start saying them when they're watching.
When your sister\brother is sleeping, put your face right on top of theirs, stare at them and breathe hard, cough on them, and sneeze on them.
Sing a song to them. Particularly songs that when sung over and over again become annoying, like My Bonnie Lies Over the Ocean and The Song That Never Ends from Sesame Street. Sing it in an annoying tone, and make sure that they don't like the song.
Continually poke them and jump backwards if they attempt to retaliate. That is famous for annoying people, and mostly people go slightly far away and poke really fast, then they have a book next to them and they quickly pick up the book and start reading.
When they supposedly have a boy/girlfriend when they are talking on the phone, get on the other receiver, blow into the mouthpiece, then hang up and runaway!
When he/she is talking on the phone, run around in circles yelling (their name) has got a boy/girlfriend! (the older that person is, the more of a compliment it is, like around lower-teens).
Follow them around and stare at them wherever they go. That is yet another popular annoying trick. If they stare back, then start staring at them with very very wide eyes and a scary face, put your face about an inch away from theirs, and make it obnoxious.
While they are Instant Messaging their friends and they go to the bathroom or take a break you can sneak over there and type some words to their friends saying it's your sibling...
When your little brother has just sat down to play his new favorite video game, get a long, wide towel and rush over to the room he's in with the towel wrapped around you. Sit in a chair behind him. He'll look at you and ask what you're doing, but then continue to play the game.
When his attention is fully back on the game, slowly make your way over to the T.V. screen. Then, quickly cover the screen and hold it there so he can't see his game. He'll start to get angry and when he looks like he is about to explode with anger, take down the towel and run away. Don't worry when he asks you what you're doing with the towel when you first enter the room. Make up something to tell him for example: I'm cold.
If he starts charging at you, don't worry, you're faster than him! Note that he might tell, but put then quickly put the towel away. Then there's a better chance your parent(s) will believe you.
Play the kazoo. A kazoo is very annoying. Play it loudly and obnoxiously.
Another annoying instrument to be playing all over the place is a recorder. This time, take the top part of it off, and blow into it loudly when your sibling is doing homework or watching its favorite TV show etc.
Write a science experiment on him for your class. Constantly sit beside him and stare it him, occasionally writing notes. But never let him see what you're writing!
Hang around your older sibling when they're spending time with a boyfriend/girlfriend. If they're snuggling in the living room while they watch a movie, sit down and start watching. Note: It will be a test of wills for who gets awkward first.
While they're on the phone with their girlfriend/boyfriend, get on the phone secretly to listen. You may get in trouble, but it's all worth it. Trust me! Hint: when revealing you were listening, say it at a special time. But not too early!
If an older brother/sister and he/she wants to be left alone, or is really stressed out at something, a good thing to do is go outside there room, and start doing something really noisy, but make it look productive so they really can't complain (Like using the vacuum cleaner, playing a loud instrument, etc)
In the middle of a restaurant, or in front of their friends, embrace them in a huge hug and say I love you soo much over and over again. Also, to make it worse wear bright, bright lipstick and kiss them all over their face... They get sooo embarrassed!
If they are mad, go to their room and shut the door, knock over and over again until they come to the door. If they come to the door and ask you what you want, pause and say, I forget. That will get them ticked.
If your little sibling is in the bath tub with the curtain closed while leaving the door open, turn off the light and shut the door
While your older sibling is trying to sleep, put your face right near theirs and breath deeply.
When they're on the computer or reading a book or a magazine get a cup fill it with a little bit of water and get a straw and drink it all and slurp A LOT!!! It'll drive them CRAZY!
If your older sibling is playing a video game, wait until they leave the room. Make sure that its an important game, like Halo 3 or Lost Planet, and that they saved like 4 levels ago or something, and they've almost finished the level. Once they've left the room, restart the level and quickly hide. Make sure you have more than one sibling, so there are more suspects.
If your sibling is doing something that they don't want your parents to know about, tell on them. They hate that!!
If your sibling is playing something like Guitar Hero or Rockband, sing the song in a high pitched voice. this works well with Rockband 2 if the victim is playing Livin' On A Prayer
Get a sketchpad with lots of paper, and sit near your sibling's doorway. Rip out a paper, write something stupid on it, and slide it under the door. Keep sliding papers under the door until you're all out of paper.
Tell him you can smell him from a mile away.
Ask him if he's really wearing that.
Hide his favorite things repeatedly.
Call him (your brother) a girl.
Cheat at games and then say I win! or beat him at your favorite game and shout you lose! repeatedly.
Make random noises every now and again, making sure that they do not see you. They will get annoyed, wondering where it is coming from and you can just sit around the corner watching and laughing!
Have a sleepover with your best buds. When your sister or brother (and Dad) goes to sleep, slumber the sibling(s) and set up some pranks for when they get up. When you're finished, put all your slumbering stuff on your dad's side of the bed. Or, if you have multiple siblings, slumber one, then put the stuff in the other sibling's room! Then wait...
Here is Really good Prank to Pull on one of your Siblings-Take Whip Cream (Or Something Else Like It) Spray it on their Hand (Must must be Asleep!) Then, Tickle Their Nose/Other body Part Watch the Cream go Flying...
Poke them over over they'll get annoyed but you can act like you did nothing like run get a book jump in your bed act like your reading the book then poke her (Has to be a older Sibling) then wait...
If they have friends over ( especially the obnoxious annoying ones who call you names) casually walk through the room they are in, if its the kitchen make a show out of making a sandwitch, if lounge room then start doing your homework in there or pretend to ( make sure you are actually writing) note: if its their room just say you want to borrow something ( make sure you have something in mind) Their friends will call you names after a while, as soon as they do just leave the room and tell your parents, this may sound like tell talling but don't worry your parents won't see it that way, and then your sibling gets told off in front of their friends and they know its your fault but they can't do anything!
Yell their name about 40+ times in variations and nicknames that they hate, right in their ear when there busy. Or, hide and say it, so that they can't fin you.
Hide In the shower and jump out when they are peeing
Point at them. You don't even need to look at them, but if they move keep following them with your finger.
Convince them they're adopted.

Source: http://www.wikihow.com/Annoy-Your-Siblings

this is what my lil brother does to me --

follow me around
repeat me
take my stuff
yell my name all the time
cry over stuff.

many moree !

embarrass the sh*t out of her when she has her friends over.. say things that they dont know about

Hey sup LYLAS!!!
o I like 2 wear all of her clothes and then tell her they are urs

God, Don't annoy her otherwise she'll annoy you back

Tell her you'll announce her boyfriends name infront of the whole school.

trust me she will get you bk ten times worse, act all inocent and nice that may ind her up though.x

Hang around when her friends are over.
follow her around everywhere she goes.
totaly ignore her and she will be p/o.
Tell on her whenever she does something wrong.
Call her names.
Embarrass her at any seen chance.
Pretend that she doesn't exist.
Hope this works for you!

if she has a boyfriend sing the song name and name sitting in the tree kissing.first comes love then come marrige...

ignore her for ageees until she loss her rag and shel ni it ent anoyin you so shel stop hopefully

kick her in her sleep and put toothpauste all over her

I use my sisters flat iron afer she leaves for school! I leave it plugged in [not turned on] and unlocked. she gets home and I so pissed! I wear her cloothes all the time and put them back befor eshe gets home! its so fun. I also called her a btich once and she to chicken to say it back so she went and told on me but I think my dad was kinda proud of me for sticking up for my self. me holds everything ove rmy head. she calls me fat and says my hair is disguisting and then she expects me to be nice to her. she calls me a snot in the nastiest way and im like do you hear yourself? to make her mad just use her stuff, eat the food she picks out and wear her clothes!

how can you start this off with be the mature one and end it with convince them they are adopted and tell on them..?

Well, you can say embarrasing things about her infront of her friends. If you really want to get to her, put Nair in her shampoo. Good times, good times.

Don't flush the toilet

put rubber bands or clear tape over the squirter thing on the sink (if you have one)then when he/she goes to turn on the sink water will hit them!! Believe me I did it on my aunt and my because!