Be good

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Be good.

a departure response meaning "good-bye and behave yourself." Jane: Well, we're off. Be back in a week. Mary: Okay, have fun. Be good. Jane: Do I have to? Tom: Bye. Be good. Bill: See you next month.
See also: good
References in classic literature ?
Now we'll all be good, and plan nice things for poor Mac," she said, smiling so graciously that the boys felt as if the sun had suddenly burst out from behind a heavy cloud and was shining with great brilliancy.
True, it can be good times when you're that "it" girl at the top of the social heap, envied by others who dream of having your rockin' life.
My parents showed me by their behavior what it meant to be good.
It is hard for people to be at peace, which is the basis for all joy, unless they are trying to be good," said a Benedictine monk.
I choose to be good," said the other, whose life experience has not been so rosy, "because after death I want life to be easier.
And the motivation to avoid bad behavior is sometimes purely practical, as in the case of this individual: "I try to be good, because the bad life is too much of a hassle.
I am good at dealing with double glazing salesmen, I am good at getting rid of religious loonies, and I used to be good at getting shot of Irish navvies wanting to resurface my drive.