put one's foot in it
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.
THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Words nearby put one's foot in it
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.