clean up act

clean up (one's) act

To improve one's behavior. After I got in yet another fight at school, the headmaster told me that I had to clean up my act or else I'd be expelled.
See also: act, clean, up
Farlex Dictionary of Idioms.

clean up (one's) act

Slang
To improve one's behavior or performance.
See also: act, clean, up
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • clean (one's) act up
  • clean act up
  • clean one’s act up
  • clean up (one's) act
  • clean up your act
  • change (one's) ways
  • change your ways
  • mend (one's) ways
  • mend one's ways
  • mend your ways