A genius failed by the education system who can secretly answer math problems at a post-collegiate level but doesn't reveal this talent until it is too late.
Matt Damon: DON'T DO IT, MAN! NOT YOU, MAN!!!!
Student: Shut up, janitor.
1. People with huge beards in your school that cleans up after your shit, but in reality, they are the rulers of the world. Usually old people with a crazed look in his eyes, they are very wise and the only mens on the planet able to make babies.
2.He's your dad.
1. Voter 1: Hey, is George Bush a janitor?
Voter 2: Nah he's too dumb to be one. Osama is a real janitor. Look at the size of his beard!
A player in halo 2 that waits for two players to engage in combat and then kills both of them. He gets credit for kills that he didnt earn by cleaning up like a janitor.
"Mike you are such a janitor. You didnt have onelegit kill you puss."