the done thing

the done thing

  (British, American & Australian) also the thing to do (American)
the correct way to behave in a particular social situation (usually negative) Wearing jeans in an office environment isn't really the done thing. You can't smoke during the meal. It's not the thing to do.
See also: done, thing
References in periodicals archive ?
and w f That's not the done thing for a jockey riding at eight stone.