on (one's) good behavior
on (one's) good behavior
Being very polite or exercising exceptionally good manners. Primarily heard in US. Now, you kids must be on your good behavior for your Auntie this weekend! Good morning, class. I hope everyone was on their good behavior for the substitute teacher yesterday.
See also: behavior, good, on
Farlex Dictionary of Idioms.
- be on (one's) good behavior
- (one) (has) never had it so good
- expecations
- expectation
- come up to (one's) expectations
- come up to expectations
- bein
- bene darkmans
- do no good
- for good measure