1. Meaning, "to smoke crack" in present tense;
2. To refer to another's actions in an
extreme manner (can be used in either
negative or positive connotation).
Fred:
Hey, how come
Bill always manages to get a 50 killstreak on Modern Warfare 2?
Jim: Dude, I don't know. I think he's smoking crack.
OR
Jason:
Hey, is Mark coming over to smoke some happy grass with us tonight?
Ted: No, he said he's staying home tonight and smoking crack instead.