Put My Foot In My Mouth
You can say, “I put my* foot in my* mouth”after you say something embarrassing.
*my, your, his, her, our, their
Examples
1. I put my foot in my mouth when I called my girlfriend the wrong name!
2. Mike always puts his foot in his mouth when he speaks Japanese. Yesterday he tried to say, “Be careful” to his boss. But he actually said, “Kiss me!” to him.