jack-mack
When you kick someone’s ass with a sock full of cheap canned fish, probably because you ran out of actual weapons and your lunch was already stolen.
My lunch was stolen by a guy who thought a sock full of tuna was a weapon.
I got jack-macked by my cellmate because I laughed at his bad haircut.
The guy in the next cell got jack-macked because he said my soup was 'disgusting.'