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”).
White lie
Ken: Yesterday I lost the watch that my girlfriend presented to me. Should I tell her this thing?
Lily: Certainly Not! Your girlfriend will be angry with you. Children and fools tell the truth.