A socially awkward or tactless act.

synonyms: faux pas, gaffe, gaucherie, slip.

Roget 477: intuition, instinct, association, hunch, gut feeling; presentiment, premonition; rule of thumb; superstition; astrology^†; faith (supposition) 514.    sophistry, paralogy^†, perversion, casuistry, jesuitry, equivocation, evasion; chicane, chicanery; quiddet^†, quiddity; mystification; special pleading; speciousness etc. adj.; nonsense etc. 497; word sense, tongue sense.    false reasoning, vicious reasoning, circular reasoning; petitio principii [Lat.], ignoratio elenchi [Lat.]; post hoc ergo propter hoc [Lat.]; non sequitur, ignotum per ignotius [Lat.].    misjudgment etc. 481; false teaching etc. 538.    sophism, solecism, paralogism^†; quibble, quirk, elenchus^†, elench^†, fallacy, quodlibet, subterfuge, subtlety, quillet^†; inconsistency, antilogy^†; a delusion, a mockery, and a snare" [Denman]; claptrap, cant, mere words; lame and impotent conclusion" [Othello]. meshes of sophistry, cobwebs of sophistry; flaw in an argument; weak point, bad case.    overrefinement^†; hairsplitting etc. v.. ... show more

Roget 568: solecism; bad grammar, false grammar, faulty grammar; slip of the pen, slip of the tongue; lapsus linguae [Lat.]; slipslop^†; bull; barbarism, impropriety.   

Roget 579: inelegance; stiffness etc. adj.; unlettered Muse" [Gray]; barbarism; slang etc. 563; solecism etc. 568; mannerism etc. (affectation) 855; euphuism^†; fustian etc. 577; cacophony; words that break the teeth, words that dislocate the jaw; marinism^†.    ... show more

Dutch: vergissing, flater, blunder, taalfout
Polish: niezręczność, niedelikatność, nietakt, uchybienie, gafa