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!
by eighteencows August 10, 2017
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commonly heard in the woodstock/london area of southwestern ontario, hackin a dart is slang for smoking a ciggy
yo dude wanna hack a dart
by smoke poppers March 4, 2011
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Smoking a cigarette of any kind whilst inhaling the smoke and exhaling it.
Robert was hacking darts with his friend Brad
by bigslut69 November 3, 2010
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