smartassery means the behaviour of a smartass. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From smartass + -ery.
noun
- The behaviour of a smartass.“'Is that the best you can do with all your big-talk smartassery? Aspirin?' Harold stuffed his hands into his pockets and looked at her miserably, accepting the rebuke.”