(slang) A lame person; someone who is worthless or a loser.
I need a father who's a role model, not some horny geek-boy who's gonna spray his shorts whenever I bring a girlfriend home from school. What a lame-o. Someone really should just put him out of his misery. 1999, Alan Ball, American Beauty (motion picture), spoken by Jane Burnham (Thora Birch):