A girl with low self-esteem that is particularity easy to identify, use, and then keep on the backup roster.

Similar to the corner pieces of a puzzle.
Jackie: He's the captain of the football team, even if I slept with him and it didn't go anywhere, would that be so bad?
Scott: Don't be a corner piece.
by ScoJac2012 March 11, 2014
Get the corner piece mug.