Best respond to what's up

If someone ask me whats up, what am I gonna respond or answer??

If it is a hot chick asking say My penis.

tell em what your doing
like : nothing much
or
listening to music
stuff like that then ask you ?
hope it helps

I usually say something I'm doing or nothing much and you. Some say random stuff.

damologist your disgusting !!!

lolll damologist haha you tripper.

You can say, its not up after seeing you or its not up but leaning to the right or left at the moment..

LOL, some of our aussie blokey blokes enjoying greeting people with ---hey how's it hanging mate? --- which basically means, how are you

I have a good respounds just say whats up too,it is not that hrad,my friend.

if its thru text just b like:
nuthin much hbu
if someone askes you like in person, just b like
well,duh,im talking to you

Hope this helps
S.C.P.

...just look up...

hahaha
like that one capain

I usually say the sky, clouds, whatever may be up
then ask 'em
what's down? What's all around?