I am in your exact same position. I want to get cut before the end of year school beach trip but I don't have the time or cash to buy only super super organic things, and I am not a fan of fruits or vegetables.

I have taken up weight training in addition to climbing and martial arts, and have completely given up fast food. I have been eating a good amount of bananas lately (the only fruit I can really get in to) and have been drinking protein shakes everyday. i use Optimum Nutrition's Gold Standard Whey since you get 5.13 pounds of whey powder for 40$ and it has 24g or protein a scoop!
So far my biceps haven't really improved in size at all, but I started doing bench press for the first time in my life and I have made pretty noticeable size and strength gains in 6 months of bench press.
I'm also very lucky to have a naturally very low body fat %.