: to improve to a good or acceptable condition or standard of behavior shaping up at the gym. transitive verb. : to bring to a good or acceptable condition or standard of behavior. Synonyms More Example Sentences Learn More About shape-up.

How do you use shape up in a sentence?

I've been told that if I don't shape up, I'll lose my job. 3. If he doesn't shape up, he'll soon be out of a job. 4.

What does shape up or shape out mean?

said to mean that someone should start behaving in a more reasonable or responsible way, or else they should leave the place where they are or give up what they are doing.