tacky, adj.² — Green’s Dictionary of Slang

tacky adj.²

[SE tack, a new or altered course or line of action, endurance, stability, strength]

(W.I.)

1. tricky, hard to beat, cunning.

1956

cited in Cassidy & LePage Dict. Jam. Eng. (1980).

2. good, skilled, clever.

1956

cited in Cassidy & LePage Dict. Jam. Eng. (1980).