Dictionary.com
Thesaurus.com
Showing results for put one's foot in it. Search instead for put-one-s-foot-in-it .

put one's foot in it

Idioms  
  1. Make a blunder, as in I didn't know it was a surprise party; I guess I put my foot in it. This expression presumably alludes to setting one's foot down in mud or excrement. [Late 1700s] Also see foot in one's mouth.