potzer
From the chess-related movie Searching for Bobby Fischer. The correct spelling is actually "patzer," and it's a derogatory name for a weak player. The term was revived in the Kevin Smith film, Chasing Amy
Don't be a complete fucking potzer like you were last night
potzer
a person who does or says something to make a fool of himself.
Man, stop jumping around. You look like a potzer.
potzer
A person who plays for traps in a game of chess.
That potzer got me with a cheap opening trap.