Footing your mouth
Putting your foot in your mouth, partially or as a whole.
I: What’s that in your mouth
C: My foot
I: Did you just fist your mouth
I: Oh no, you footing your mouth
C: My foot
I: Did you just fist your mouth
I: Oh no, you footing your mouth
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.