Double fisherman knot 

When a girl is giving anal while performing a 69 with two guys both with hooked/curved dicks

Girl 1: I got into a double fisherman knot last night. It was intense!

Girl2: I always wanted to try one of those!

Double fisherman knot by Fratrat November 2, 2014

double d diet 

A popular diet used among gamers who play Call of Duty. This diet consists entirely of Doritos and Mountain Dew.

"Dude I went on the double d diet this weekend."
"Me too man, I got so many perks from all the codes!"

double d diet by DancingHeart22 November 26, 2014

double chin sunday 

It's like selfie Sunday only the selfie has to be featuring a double chin. It's self-explanatory.

"Let's take a double chin pic for double chin Sunday!"

double chin sunday by Godthegoon January 11, 2015

double dining slut 

Somebody who makes it seem like a special thing that two couples have dinner together when in reality they are just cycling couples like slot machine.

Those guys are a double dining slut.

double dining slut by megatooth January 17, 2015

double tap 

To fire aimed fast rounds to torso center mass. Frequently followed by a head shot to the head.

The agent shot the terrorist with a double tap and a head shot.

double tap by English Cocker March 7, 2015

Double Parking Lot Surprise 

When you're leaving a movie with your girl and she's wearing a miniskirt and out of nowhere you fist her vag and ass at the same time.

"Did you hear why Katie's having trouble walking? John gave her the double parking lot surprise after watching Mockingjay part 1!"

Double Parking Lot Surprise by patohoulahan March 28, 2015

Double Dipping 

The act of inserting your penis into the vagina, then into the butthole, and back into the vagina thus causing major sexually transmitted diseases.

Dude, you should have seen it last night. I was Double Dipping in Nick's mom so hard last night! I hope she doesn't catch anything.

Double Dipping by fetusandbars April 10, 2015