What is Jim Bag?
1.
A fraternity house lurker who spends his time creeping on girls who were previously enjoying themselves. Their sole mission in life is to destroy any fun at parties. (also includes cock-blocking)
"Hey Jim Bag...quit creeping all over that girl im trying to hang out with"
"I'm not even that drunk, You're drunker than I am"
"Jim Bag get the Fuck out"
"-really? --really?"
See