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Douglas Harper's Etymology Dictionary
smart-ass

also smartass, 1960 (adj.), 1962 (n.), from smart (adj.) + ass (n.2).

Wiktionary
smart-ass

n. (alternative spelling of smart ass English)

Usage examples of "smart-ass".

Which meant that none of them were very happy to be told that the smart-ass humans were going to show them how artiller y ought to be made and used.

Now, I did have a couple of smart-ass lines I got used to giving at autographings, appearances, speeches, and SF conventions when I would inevitably be asked to do more Well World material, the most common of which was naming a dollar figure so impossibly high compared to what even the best in the field were getting paid at the time and saying that if somebody offered me that much, and if I had an idea I thought would not cheapen, and might possibly enhance, the existing books, I might consider it.

For a moment it seemed as though Lori were going to make some smart-ass crack at the old man, but she caught Ryan's eye and kept silent.

But Hargrove had no intention of loaning his personal Sikorsky H-76 Eagle helicopter, its crew, and six of his Rangers to a pair of smart-ass bureaucrats, certainly not in a combat area.

Some of those smart-ass gadgeteers could prob'ly limit the stuff a synthesizer makes, but as for ginnin' up cheap drugs, I sure hope so.

He knew Hobbs Land wasn't much, from the point of view of adventure—Theseus himself said that—but it wasn't up to two damned smart-ass Phansuris to tell him so.

While she was hiding out in Alabama, she'd read a smart-ass newspaper column in the Commercial-Appeal that quoted a prosecutor as saying the first four whacks could have been emotional, but the last two indicated intent: They were looking for her on a first-degree murder warrant.

Then again, there are a lot of smirky, smart-ass rednecks who've learned the wisdom of backing off when Ruby Bee gets a certain tightness to her mouth.