put foot in mouth
to blunder, to stumble
She really put foot in mouth when she called her boyfriendby he name of her ex
put one's foot in one's mouth
To say something that one will regret,to make an error.
To put one's foot in one's mouth is the same as stepping in it.
put your foot in your mouth
Saying something that makes a person feel pain or embarrassment.
I had to second-guess you for a while for putting your foot in your mouth.