How do I lose weight fast and hide it?

I am not really trying to be anorexic but I do want to no how to lose weight fast and how to hide it for my mom and grama please respond and tell me because I really need to lose weight .

Why would you even think about anorexia??? Not only will you look gross you will do extreme harm to you body. I'm going to school for my masters (majoring in nutrition) and will become a registered dietician in a year. Ok when you diet without exercise, you will loose weight indeed but guess what that weight is? Its muscle. In order to healthfully loose weight and keep your muscle (which burns 50 calories per pund of muscle just being there as opossed to fat burning a big fat 0 calories) you need to reduce you daily calorie intake and exercise at least 30 minutes a day. The best thing to do is 30-45 minutes of cardio 5 times a week, and 30-45 minutes of strenght training a week.
If you diet without the exercise you will loose the muscle first, you will indeed to appear thinner but you WILL without a doubt gain body fat constantly if you dont exercise no matter how little a day you eat.
If you need some help on how to figure out how many calories to eat let me know how tall you are, your age, and your wrist circumfrence to determine you body frame.
Please whatever you do DONT take the anorexic route. Why would you want to do harmfull permanant damage to your body and mostly your metabolism? Your metabolism is what keeps you going. Why would you even want to starve yourself? There are sooo many healthy options of food out there.
I let myself go when I got married when I was just 17 and then divorced 3 years ago. When we were divorced I thought about all the easy way outs, but really got into health and nutrition. I followed a low calorie diet and work out 5 days a week. I went from 155 (at 5'9) and a size 5 down to a healthy 120 pounds and a size zero. Its very easy, and your weight loss WILL LAST if you do it the right way. Let me know if you want me to help you. Please dont be stupid and make the wrong choice.