2)a person who corrects other when they make mistakes too but are too proud to admit it so they bag on u
Smart ass: omg u moron ur such a fcuking retard, its pi not pie.
Smart ass#2: well its fucking not fcuking you noob.
Smart ass: shut up im smater than you.
Smart ass#2: smarter not smater.
CrazyChick: Hello room.
You: Why the fuck are you talking to a room.. There are perfectly good people here.
CrazayChick: Fuck you man Damn smartass.
Smartass: Cause you came in... we made it that way to annoy you. (hyuk, hyuk)
(not exactly the opposite of dumbass because a dumbass really is an idiot but a smartass isnt neccessarily a genius)