If you're out with the homies after the club and don't want to sound like a bytch just get anything with chicken in it. If you can get the least amount of bread and more chicken breast (if it's an option). If it's a burger place, just get the burger add an extra patty and get no sauce(no mayo or ketchup, mustard is okay) and no cheese or bacon. Don't get any fries. For the drink get coke zero or if you're still being shy order a drink but don't drink it or drink half of it and get some water instead (say the sprite doesn't taste good here or whatever I'm remember what it's like to be 16).
if you forgot to pack a lunch and you're at work or school, just some basic shyt for protein. Up the meat, cut out a lot of sauce and bread, and load up on vegetables. That will keep you close enough to you're goals till you're able to hit the grocery store up for what you need. If you're not making regular trips to the grocery store to get your food
get in there and save some money overall. Stop wasting your time eating out cause it could be what's holding you back from your fitness goals. Prepare your own meals or find a place where you can get meals that meet your needs consistently. Don't leave what you eat to the last minute because it's the most important thing when it's comes to achieving your goals.