A sexual maneuver where the male is receiving oral sex from a female with a cleft palate. Since there's a naso-oral communication, the male can shoot his sperm out of her nose from the inside-out, making it appear that she just shot out a double-barreled snot rocket.
by Clefty the Lefty December 11, 2007
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.
Matthew: After I finished I made my missus Double Barrel Cum Gun.
Dave: Oh respect.
by Greatest cum master of Devon May 15, 2021