noun
a breach of etiquette or of social convention
hustled him out of the room before he could commit another faux pas
Synonyms: blooper, boner, ||boo-boo, break, gaffe, impropriety, indecorum, solecism; compare error 2
Related Word: bungle, misstep, stumble; howler, screamer; indiscretion, misjudgment, oversight, pratfall