put your foot in it

put (one's) foot in it

To unintentionally say something foolish, tactless, or offensive. Oh man, did I ever put my foot in it—I just congratulated Sarah's sister on being pregnant. She isn't. He just tends to put his foot in it when he's forced to speak for too long, so try to get him off stage as soon as possible.
See also: foot, put
Farlex Dictionary of Idioms.

put your foot in it

BRITISH, AMERICAN or

put your foot in your mouth

AMERICAN
COMMON If you put your foot in it, you say something which embarrasses or offends the person you are with, and embarrasses you as a result. I put my foot in it straight away, referring to folk music. Tom sat forward and glared. `It's not folk music, man. It's heritage music.' To the majority of voters, he is a lightweight, forever putting his foot in his mouth.
See also: foot, put
Collins COBUILD Idioms Dictionary, 3rd ed.

put your foot in it (or put your foot in your mouth)

say or do something tactless or embarrassing; commit a blunder or indiscretion. informal
1992 Deirdre Madden Remembering Light & Stone As the evening went on, and people made a point of not talking to me, I realized that I'd put my foot in it.
See also: foot, put
Farlex Partner Idioms Dictionary

put your ˈfoot in it

(British English) (also put your foot in your ˈmouth American English, British English ) (informal) say or do something that upsets, offends or embarrasses somebody without intending to: He really put his foot in it when he mentioned the party to her. She hadn’t been invited.
See also: foot, put
Farlex Partner Idioms Dictionary
See also:
  • put (one's) foot in it
  • put one's foot in it
  • if you keep your mouth shut, you won't put your foot in it
  • put (one's) foot in (one's) mouth
  • put foot in mouth
  • foot in one's mouth, put one's
  • stick (one's) foot in (one's) mouth
  • foot-in-mouth disease
  • clanger
  • drop a brick/clanger