When you put out your, still very hot, but used cigarette in your partner's anal cavity.
Jeff: You know you should really try smoking while you have sex?
Joe: Why?
Jeff: After you finish you can giver her a Cigarette butt.
Joe: What the fuck is a Cigarette butt...
The unit of measurement that smokers use between destinations to determine if they should light up a cigarette, with the reasonable certainty it will be smoked by the time they arrive. White trash only use this measurement when giving directions to other white trash.
Jimmy to his common law wife: How far is the Walmart from the bar?
Common law wife to Jimmy: the cigarette distance is about 3 cigarettes.