be not the done thing

Of a given behavior, to be unacceptable, inappropriate, or incorrect in a particular social situation. Primarily heard in UK. You should know better than to wear a skirt like that to a formal dinner; it is simply not the done thing! I'm so glad smoking indoors is not the done thing anymore!

Common Names:

Name	Pronounced	Usage
Georgie	['dʒɔ:dʒi]
Bill	BIL	English
Angus	ANG-gəs	Scottish, Irish, English
Chikako	chee-kah-ko	Japanese
Oenone	-	Greek Mythology (Latinized)
Inez	-	English