Noun
smarty (plural smarties)
(informal) An obnoxiously clever or quick-witted person.
Synonyms: smart aleck; see also Thesaurus:know-it-all
Dyatlov Pass is one of those mysteries that, as many times as some smarty pants is like, "Look y'all. Source: Internet
I can identify more with her because of her bookish qualities, but I'm not sure I'd want to go up against the deadly wizard of all times, even I was a smarty pants. Source: Internet
Not to be a smarty pants." Source: Internet
The currently lobster coloured smarty pants has always looked, er, smart. Source: Internet