A fork of Rural Dictionary
This sexual manoeuvre requires one male receiving oral gratification from one (or more) female's. When the male in question ejaculates in the females throat, the female will the close her mouth and squirt out of her nose. Thus causing plenty of spaff to speed out of her nasal cavity, causing the Double Barrel Cum Gun effect that is desired.
Dave: What did you get up to last night then?
Matthew: After I finished I made my missus Double Barrel Cum Gun.
Dave: Oh respect.
When your so exasperated with anything you could blow both sides of your brain out.
Man I hate this job, pretty sure I'm gonna double gun it in a sec.