To put your foot in your mouth (or stick your foot in your mouth) means to say something embarrassing, tactless, foolish, or unintentionally offensive. It describes making a social blunder or blunder of speech that causes instant regret.
A related variation is put your foot in it, commonly used in British English to mean making a mess of a situation by speaking carelessly.
When someone routinely makes these embarrassing verbal slips, they are humorously said to have “foot-in-mouth disease.”
Note on Food Slang: Do not confuse this idiom with the slang expression “putting your foot in the food” (or “she put her foot in this”), which is a compliment meaning someone cooked a meal exceptionally well!
Origin of “Put Your Foot in Your Mouth”
The idiom put one’s foot in one’s mouth dates back to at least the mid-19th century in American and British English. While its exact etymological origin is unproven, it likely evolved as a vivid visual metaphor, alluding to opening your mouth to speak and inadvertently stuffing your own foot inside it, making it impossible to say anything intelligent.
The variant foot-in-mouth disease emerged in the mid-20th century as a pun on foot-and-mouth disease (or hoof-and-mouth disease), a contagious viral infection affecting cattle and livestock. While cattle suffer physical blisters, human “foot-in-mouth disease” is purely a metaphorical affliction of bad timing and awkward remarks!
“Put Your Foot in Your Mouth” in Movies & Pop Culture
In film and TV, characters frequently “put their foot in their mouth” during awkward social situations, romantic blunders, or formal dinners:
- The Office (US): Used when someone accidentally reveals a secret or makes an embarrassing comment in front of coworkers or bosses: “I completely put my foot in my mouth during the meeting today.”
- Bridget Jones’s Diary (2001): Bridget frequently blurts out awkward, overly personal thoughts in formal social settings, exemplifying classic “foot-in-mouth disease.”
- Friends: Chandler Bing often jokes about his own habit of using nervous humor when meeting new people, constantly putting his foot in his mouth.