When you say something that is socially improper, this is an example of a gaffe.
Origin of gaffeFrench ; from Old ProvenÃ§al gaf: see gaff
- A clumsy social error; a faux pas: “The excursion had in his eyes been a monstrous gaffe, a breach of sensibility and good taste” (Mary McCarthy).
- A blatant mistake or misjudgment.
Origin of gaffeFrench, from Old French, hook; see gaff1.
- A foolish and embarrassing error, especially one made in public.
From French gaffe (“blunder”).