Clean Your Clock Share definition Flag 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. Clean Your Clock by Super Cru (C-Baller) November 3, 2008 0 0 Get merch Get the Clean Your Clock mug. Buy Now — $32.95 See more merch