Clean one's clock American informal verb phrase
To decisively beat someone up
Shut your mouth up or I'll clean your clock .
James' opponent was so strong that he cleaned James' clock.
The verb "clean" should be conjugated according to its tense.
The phrase dates from the mid-1900s. This term originated in the military. The use of "clock" is unclear but possibly alludes to hitting someone in the face (for “clockface”).
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!