What is A Boxers Lunch?
1.
Punching oneself in the stomach in a crude and ineffective attempt to stave off hunger.
Ah man, I can't be fucked going to the kitchen, time for a boxers lunch.
2.
Feeding someone thier teeth. Intentionaly doing as much damage as possable with a punch.
Fuckshit, I'm gonna feed you a boxers lunch!
See
3.
A variation of
Keep it up and you'll be eating a boxers lunch.
See