means to thoroughly take someone to task
Brian was spreading false information behind Mark's back, Jared told Mark about Brian then went back to Brian and said " Mark is going to clean your clock!"
by urbal February 23, 2011
A slang phrase meaning to strike a blow to the face, where someone's face is their 'clock'.
Steve: Wow john, you blew it there.
John: Oh shut up, or I'll clean your clock.
by Super Cru (C-Baller) September 19, 2008

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