gaffe

n. mistake; slip of the tongue; blunder

Error refers to a difference between actual behavior or measurement and the norms or expectations for the behavior or measurement. The concrete meaning of the Latin word error means "wandering" or "straying", although the metaphorical meaning "mistake, misapprehension" is more common.
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Noun
1. a socially awkward or tactless act
(synonym) faux pas, solecism, slip, gaucherie
(hypernym) blunder, blooper, bloomer, bungle, foul-up, fuckup, flub, botch, boner, boo-boo

v. gawk, stare, ogle, gape foolishly, rubberneck, look at with curiosity, gawk at

n. barge pole, gaffe, boat hook, gaff; (Informal) blunder, boner, bloomer

v. blunder, goof, slip, trip up, watch out