The definition of a gaffe is something that you say that causes you to feel embarrassed, such as a social blunder or a faux pas.
(noun)When you say something that is socially improper, this is an example of a gaffe.
See gaffe in Webster's New World College Dictionary
noun
Origin: Fr < OProv gaf: see gaff
See gaffe in American Heritage Dictionary 4
also gaff
nounOrigin:
Origin: French
Origin: , from Old French, hook; see gaff1
.Learn more about gaffe