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The Collaborative International Dictionary

Knacky \Knack"y\, a. Having a knack; cunning; crafty; trickish. [Prov. Eng. & Scot.]

Usage examples of "knacky".

Caesar had devised a knacky way to carry his moneyit was money, not unminted sows.

Evan had the knacky notion to invite Holly to watch, thinking to impress her with his prowess.