This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. 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).

n. A blatant mistake or misjudgment.

n. A foolish and embarrassing error, especially one made in public.

n. A socially awkward or tactless act.

n. a socially awkward or tactless act

"The remarks were so bizarre some observers dismissed them as just another gaffe from a candidate dogged by allegations of infidelity and sending pornographic images by email."

boo-boo    fuckup    bloomer    foul-up    pratfall    blooper    boner    botch    flub    bungle   

faux pas    solecism    slip    gaucherie    boo-boo    mistake    error    defect    fault    thinko   

Graf    Naff    Taff    behalf    calf    carafe    chaff    gaf    gaff    giraffe   

setback    contretemps    misconstruction    stirrer    blunder    bookmarking    U-turn    grouping    repercussion    adgrunt