Country Dictionary

A mule/donkey of unusual intelligence

that's one smartass you got there
my smartass died
im gonna beat your smart ass

Someone who possesses superior intellect and wit and understands the reason behind and the purpose for satire in life.

She always knows when to insert humor to make him laugh, even when he’s bummin’. She’s such a smartass.

a person who persistanly uses sarcasm as a means of communication.

"Leanne is so funny, she's just a big smartass"

The act of being a smart ass

people read into your smartassness and take it for more then it is worth

A person who just has to make everything make sense. Speaking of which, smartass is a oxymoron because an ass is a stupid person so smartass means "smart stupid person".
(not exactly the opposite of dumbass because a dumbass really is an idiot but a smartass isnt neccessarily a genius)

I guess this definition makes me a smartass

N. A person who indiligently tries to provoke your thoughts, concerns, ideas, and opinions by arguing and becoming outspoken on their own part.

N. A very outspoken person

Adj. A word describing someone under a description of a smartass

Aaron Littlefield is smartass enough to have earned a spot on Urban Dictionary. Congratulations, you smartass!

being serious 1% of the time

god Christys a smartass, she's only serious 1% of the time!!