Smoke walking is a Hearthsone term. When a player is keeping his minion stealthed, he is smoke walking his opponent.

A term used to reference cannabis/marijuana/weed.

(n., smök-wok)
A transcendent on-foot experience somewhat related to the act of walking, yet not having locomotion as its primary or even secondary motive; rather, smokewalk describes the blissful state induced by tobacco smoke that occurs when one happens to be walking.