Origin in the early 1980s. To have sex. esp. to finish embarrassingly quickly, ie. premature ejaculation. But a fast finish is not necessary for the word use. Could also be used to describe high speed jack hammering, or "rabbit fucking".
It has since been redefined many times over.
an abbreviation for the day that is a birthday b-day that also happens to be an off-day if you work for a company that gives its employees the day off on their birthday.
I'll have a three-dayweekend this week as Friday is my boff-day.
