clean one's act up
clean (one's) act up
To improve one's behavior. After I got in yet another fight at school, the headmaster told me that I had to clean my act up or else I'd be expelled.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
clean one’s act up
tv. to reform one’s conduct; to improve one’s performance. We were told to clean our act up or move out.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.