Hooker or prostitute who works on the corner. Hence the name, corner pro(stitute). Mainly used by stupid high school/junior high students to insult each other.

Or it could mean someone who's a professional at working the corners.
Girl: Take it like a man, you dumbass fag! *slaps boy*
Boy: Stop it you corner pro!!

Girl: *slaps boy even harder*
by Eyewitnessonthebus May 23, 2009
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