Put Your Foot in Your Mouth

Generated image of a man putting his foot in his mouth
To put your foot in your mouth means to say something embarrassing, rude, or awkward without meaning to. It is used when someone accidentally says the wrong thing and regrets it afterward.

The expression comes from the image of someone speaking so carelessly that they metaphorically shove their own foot into their mouth. The phrase became common in English in the 1900s.

I really put my foot in my mouth when I asked about her job before realizing she had just been laid off.