bad form

bad form

Behavior or actions that are considered socially inappropriate, distasteful, or rude. Many people still consider it bad form to ask a woman her age.
See also: bad, form
Farlex Dictionary of Idioms.

good/bad ˈform

(old-fashioned, British English) a way of doing things that is socially acceptable/not socially acceptable: I think it was very bad form for Joe to arrive late for the funeral. Apparently, good form requires you to wear a hat on these occasions.
See also: bad, form, good
Farlex Partner Idioms Dictionary
See also:
  • good/bad form
  • poor form
  • in bad form
  • look bad
  • suck face
  • DOS
  • a rum do
  • a rum go
  • rum
References in classic literature
Most disquieting reflection of all, was it not bad form to think about good form?
But as a perishable perfect man must die, and leave his despotism in the hands of an imperfect successor, an earthly despotism is not merely a bad form of government, it is the worst form that is possible.
"By the way, my dear captain, you just mentioned the Rue Coupe-Gueule* That is a very bad form of speech; people are no longer so barbarous.
Rostov had become a bluff, good-natured fellow, whom his Moscow acquaintances would have considered rather bad form, but who was liked and respected by his comrades, subordinates, and superiors, and was well contented with his life.
"It's old man Challenger's show and we are here by his good will, so it would be rotten bad form if we didn't follow his instructions to the letter."
"I am glad that was it," I said, "for I could not believe you guilty of such bad form. The version which reached me was that you swore at each other, and that he was to be dismissed and you reprimanded."
Apparently it was considered bad form to remark these apertures; for when I pointed to this one, and tried to frame a question about it in their tongue, they were still more visibly distressed and turned away.
Up to that time it had been looked on as rather bad form to exact a penalty.
And finally, I must confess that, though I know it is bad form to pursue a man in this way, I have come to beg your friendship, my dear prince.
"I begin to forgive you for being in bad form at dinner."
New Delhi [India], Apr 12 (ANI): Former Australia spinner Brad Hogg on Friday opined that Royal Challengers Bangalore's bad form will not affect Virat Kohli during the forthcoming ICC Men's Cricket World Cup and termed the Indian skipper a "focused individual".
"Our job is to win each game we can and we can only change the bad form by working hard and taking it a game at a time.
They're not in particularly good form at the moment but they don't appear to be the type of team to get bogged down by bad form.
"If you've got a player like Lukaku, you play them through bits of bad form.
Jonas Gutierrez's return is one of the great black-and-white stories recent years and while think it has taken a combination of injuries, bad luck and bad form to him to this point, we should celebrate his comeback.