Food that is easily prepared, has enough vitimins and minerals to preserve life, and cheap to buy.
Cause most single guys living alone are poor and/or lazy but still need to survive.
A great example of bachelor chow is cerial, $4 buys you 5-8 meals..just add milk..or not.
Also KD and hot dogs among many others.
When someone leaves some food or drinks to his friend's ensuring he/she can enjoy it later when visiting the friend next time. A tacticalmove which can be of use when planning a party weekend, for example.
A: Hey, dude. What are your plans for tonight?
B: Nothing, my boss called me and asked me to do night shift. Steve's sick so he can't do it.
A: That sucks! You're missing all the action. Well, I'm gonna go clubbing anyway. I left some commando chow in your fridge waiting for tomorrow if that's okay.
B: That's cool. Well, I gotta go bust my ass off.
A: Good for you. I'm gonna go raving with these spanish chicks. Wooo!