smart-assyness
The act of being an ass, but with an undertone of mirth.
George: I'm sorry for the smart-assyness , but if it doesn't work out between us, do we still get to have great sex together?
Tracy: I'll think about it.
Tracy: I'll think about it.
assyness
The level of "arsed" or "bothered" you can be to do something.
Depending on my level of assyness I might go out later.