Double Barreled Action 

1. When a guy has sex with a woman while using a dildo on another woman.

2. When a guy born with two dicks has sex with two women at the same time.

3. When a woman has a threesome with two guys.

1. "Dude last night I fucked Tonya while I was using a dildo on Maxine! A little double barreled action."

2. "Last night I found some real freaky women who were lookin' for some special double barreled action. Nailed both of 'em at the same time!"

3. "Last night I got Ray and Jessie to come over and got a little double barreled action"

Double Barreled Action by Tex-Mex Shawn C. September 21, 2010

Double barreled hotdog 

When you place two hot dog weiners in a single bun.

Also double anal penetration with two penises.

Yo, I just got a double barreled hotdog, it was so filling.

Double barreled hotdog by Sharkbait028 April 27, 2022

double barreled shotgun 

When two guys align their dicks in parallel (resembling a double-barrel shotgun) and penetrate the pussy in hopes of bottoming out.

Hey Bobby lets double barreled shotgun this bitch! GOTEM!

double barreled shotgun by Gotem aka Metog April 12, 2008

double-barreled cockgun 

when two men shoot their load at the same time, and at the same target

Girl: these two guys both jizzed on my face at the same time yesterday at this party....it was like so totally disgusting
Boy: Oh, you mean Ted and Jason...they've been getting everyone with the double-barreled cockgun all week so don't feel bad

double-barreled cockgun by McGrundles October 31, 2011

double-barreled common-law assault and battery 

(not to be confused with regular, run-of-the mill domestic violence, which is strictly one spouse physically beating up the other)

when 2 common-law spouses start perpetrating physical domestic violence on each other at the same time during an argument and both require hospitalization for their injuries afterwards.

the recent case against Slava Voynov of theLos Angeles Kings is not, IMHO to be classified as domestic violence but as double-barreled common-law assault and battery, simply because both he and his girlfriend suffered significant injuries requiring hospitalization during the incident.

double-barreled common-law assault and battery by Uncle Dimma October 23, 2014

double barreled sausage 

When a man has sex with a woman and each pump alternates between her ass and vagina

Dude, I totally banged Becky last night. Gave her the double barreled sausage.

double barreled sausage by SonOfGustaf November 26, 2017

Double Barreled Hangover

A hangover of epic proportions resulting in vomiting and shitting yourself at the same time.

I drank so much last night I had a double barreled hangover this morning.

Double Barreled Hangover by xGeevesx March 8, 2011