smarty-pants

noun

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\ ˈsmär-tē-ˌpan(t)s

plural smarty-pants

Definition of smarty-pants

informal

: smart aleck, know-it-all "If you give people the impression you're a smarty-pants, that's no good for sure."— Al Gore Choosing books for picky friends can be humbling. There's always one smarty-pants who has read not only the gift book but everything else in the author's oeuvre.— Marilyn Stasio Even the smartest of smarty-pants couldn't have answered all four of those "gotcha" foreign-policy questions.— Jonathan Alter

Other Words from smarty-pants

smarty-pants adjective

… a veneer of smarty-pants condescension. — Ron Powers Every musical genre has its smarty-pants jokesters, and alternative rock is no exception. — Entertainment Weekly