indecorum
[noun]
Synonyms: faux pas, blooper, boner, boo-boo, break, gaffe, impropriety, solecism, incorrectness, indecorousness, inelegance, unbecomingness, unmeetness, unseemliness, untowardness

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Antonyms: decorum

[TahlilGaran] English Synonym Dictionary ▲

in·de·cor·um (ĭndĭ-kôrəm, -kōr-)
n.
► Lack of propriety or good taste; impropriety.
► An instance of indecorous behavior or action.

[TahlilGaran] American Dictionary ▲