clean up one’s act

(verb) to improve one’s behaviour, to become a better person

Example Sentence:

If you don’t clean up your act and start studying, you’ll never go to College!

The alcoholic decided to clean up his act and stop drinking, because it was affecting his life.

A: How is your health these days?
B: I feel healthy, but I think I need to start cleaning up my act and exercise more.

My brother is a whole new person since he cleaned up his act and stopped doing drugs.

Media:

Similar idioms:

1. clean out
2. health is wealth
3. spick and span
4. stop by
5. stop in
6. hit home
7. come clean
8. turn over a new leaf
9. touch base
10. clean break