clean someone's clock

clean (one's) clock

To thoroughly trounce, defeat, or beat up one. Watch it, pal, or I'll clean your clock for you! The visitors really cleaned the home team's clock tonight!
See also: clean, clock
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

clean someone's clock

Beat, thrash, or defeat someone decisively, as in He's much bigger than you and could easily clean your clock. This term originated in the military. The use of clock is unclear but possibly alludes to hitting someone in the face (for "clockface"). [Slang; mid-1900s]
See also: clean, clock
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

clean someone's clock

1 give someone a beating. 2 defeat or surpass someone decisively. North American informal
Clock is used here in the slang sense of ‘face’.
See also: clean, clock
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
"Basically, in but a few minutes and by merely swapping a few orifice plates, he or she could clean someone's clock and the control center would never catch on until someone physically inspected the orifice plate," said a former, long-time meter technician (who prefers anonymity for obvious reasons).