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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

Common Names:

NameGenderPronouncedUsage
Plouton-Greek Mythology
Iliana-Greek, Bulgarian
Ylva-Swedish, Norwegian
Dani (2)-Hungarian, Spanish
Baldrick['bɔ:ldrik]
Ji-Eunjee-uwnKorean
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