Noun
bad form (uncountable)
Behaviour which is contrary to social expectations, which is inappropriate or rude.
You must make, always. You must act, if you believe something. Talking about acting is like boasting about pictures you're going to paint. The most terrible bad form. John Fowles
In South Korea, which is a much less conservative environment, politicians do not take their wives around with them as much as their American counterparts do. Showing pride in your wife is thought of as juvenile bad form. There's a special pejorative for people who do it. Brian Reynolds Myers
It would be bad form for me to describe people I don't know and don't understand. Françoise Sagan
Pugnacity is a form of courage, but a very bad form. Sinclair Lewis
I made a bit of a stink. At the time, it was considered very bad form. Diana Rigg
Walking out in the middle of a funeral would be, of course, bad form. So attempting to walk out on one's own was beyond the pale. Steve Hockensmith