A girl who unrelentlessly offers her butt to guys when ever she has the chance. But when it'stime for action, she refuses to take it in the box. Just the butt.
A type of smoker (normally of taylored cigarettes, but can include rolled tobacco, and marijuana joints) who drains the cigarette all the way to the butt, not wasting even a little. It is a derogatory term and usually has association with those of lower socio-economic backgrounds.
God, don't be such a butt slut! I'll give you another cigarette, geez!