a person who smokes a lot of cigarettes in a short time.
tom: wanna go smoke?
mark: we just smoked like 5 min ago. You are such a butt kisser tom.
Some one who does anything to get their boss/co-worker/asshole friends to like them. Also someone who should be punched in the jaw.
Ken stays late to work everyday, so he can lick his bosses boots. He is a real ass/butt kisser