When a straight gutter slut is sucking you and your boy's dick and she sticks both of them in her mouth at the same timelike shes at a damn hot dog eating contest.
That ditch pig Stevi tryed doing the double barrel with me and Doug last night.
When a male wears a strap-on so he can simultaneously screw the same woman in the butt and vagina. This can also be done with a woman wearing two strap-ons.
"hey that girl is so hot I would double barrel her!"