The definition of a faux pas is a behavioral gaffe or some type of social mistake that you make.
(noun)An example of a faux pas is burping in public.
See faux pas in Webster's New World College Dictionary
Origin: Fr, lit., false step
See faux pas in American Heritage Dictionary 4
noun pl. faux pas faux pas (fō päzˈ)
Origin:
Origin: French
Origin: : faux, false
Origin: + pas, step
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