The act of smoking cigarettes at an abnormal pace or in an excessive fashion. The term implies that the subject's smoking is no longer a supplement to their primary activity, and has become a prominent characteristic of what they are doing.
We were hanging at the corner of Orchard and Pearl - drinking beers, hauling butts and contributing to cosmic babble.
I was 3/4 cocked and straight hauling butts by the bonfire for hours last night.
I spent my half hour between exams hauling butts on the library steps instead of looking over the vocabulary.