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The plural of gaffe is gaffes.
A synonym for gaffe is erro,r mistake, and blooper. An antonym for gaffe is correct, precsion, and perfection.
A gaffe is a socially awkward or tactless act.
I was not aware that my professor was a woman, so when I called her "Sir" I had to apologise for my gaffe.
Don't let an unintentional gaffe be the cause of your removal from the "A" list.
Will Rogers and Bob Hope were very good at delivering a well-placed gaffe.