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.

Common Names:

Name	Pronounced	Usage
Kwasi	-	Western African, Akan
Botros	-	Arabic, Coptic
Anastasios	-	Greek, Ancient Greek
Racquel	rə-KEL	English
Linnette	li-NET	English (Rare)
Bobette