To smoke a cigarette/blunt/or any substance that will alter your state of mind, typically to improve your ability to complete an otherwise boring task. Typically something you would say prior to doing so. Basically the equivalent of "I'm going to excuse myself real quick to go out back/run to my car to smoke a cig/blunt/joint"
i.e. Go take a smoke break
Hey man can you watch the grill? Imma go get my mind right
Im gonna start cleaning up my station, just let me go get my mind right first