What is L Double M J?
A crazy group of four teenagers that have nothing better to do than hang around in an art room after school drawing random shit and crazy fantasy puke on the board then signing it "L double M J" and ditching.
"Dude, this morning I found the whiteboard covered with mutated Pokemon, ducks, and random messages hidden behind student's artwork."
"Any idea who did it?"
"Yeah, L double M J... whoever that is."