Hacking on a dart usually refers to smoking a cigarette. The term is often picked up as a joke, but becomes usual
vocab after a few uses. Hacking on a dart is a term used mainly by British
Columbians. Hacking just means smoking, not literally coughing.
Billy: what are you guys doing on
Saturday night ?
Bobby: just shooting some Jack and
hacking on a
darts.
Billy: I'll be there!