The purchase and conveyance of cigarettes, typically from a place where they are taxed less. A pun on the word "bootlegging"; "butt" is a reference to cigarette butts. Oh, buttlegging is the only way I can afford cigarettes these days, now that taxes in our area are so high!
n. the transportation of untaxed or undertaxed cigarettes across a state line. (see also bootleg.) Most of the guys at the plant do buttlegging on the way home from work.