on (one's) good behavior

(redirected from on his good behaviour)

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
References in classic literature ?
For the little old man is going home to the Workhouse; and on his good behaviour they do not let him out often (though methinks they might, considering the few years he has before him to go out in, under the sun); and on his bad behaviour they shut him up closer than ever in a grove of two score and nineteen more old men, every one of whom smells of all the others.