Men that don't have any game.
I used to live in the library when i was in college, and there used to be this one guy that had absolutely NO pick up game. He looked like Joe Belushi and would obnoxiously ask girls two tables away if he had a class with her last semester. It would always end the same with the girl leaving in a hurry and the guy ineptly moving on to the next 'victim'.
Sad, but amusing.