One person is on the toilet shitting while the second is sitting on their lap shitting through the firsts others legs.
Me and Alex had to shit at the same time yesterday so we double decker shit.
A double squirtgun is when a man is having a 3-way with two girls, and the girls are laying next to each other and squirt at the same time.
Jon: I had a 3-way last night?
Bob: Was there a double barrel squirtgun?
Jon: You bet!
The godly connect 4 move involving setting up a situation where you get three in a row in two places so you automatically win no matter what.
Lenny:*Yooo! I just set up a double decker dosage so I automatically win the game!
Karl:Bro frick you!
When 2 girls kiss a boys cheek, also an anime trope.
Double Cheek Kiss example, Emily: Oh my god Ashley, Jake loved it when we kissed him!
Ashley: I'm so happy he loves us!
when one male is peeing into a urinal or toilet and another guy pees into the same toilet in between the other guy's legs
Bruh, there's only one toilet and both of us can't hold it. We gotta Kentucky Double Barrel this mofo.
The effect that occurs when two people named Ismail convince you of something, or convince you to do something as long as it doesn't break the law. There is a 99.8% chance that Ismail and Ismail will successfully convince the subject. There are only a handful of recorded unsuccessful cases, though many say they are false reports.
Example 1:
Person 1: Wow I can't believe Ismail S. and Ismail H. convinced me to go camping at Joshua Tree, I hate the outdoors!
Person 2: They call that the Double-Ismail Effect
Example 2:
Someone get me two Ismails, this situation calls for The Double-Ismail Effect.
When the nards of two men hit really hard as they double time a lady.
Me and my boy were totally nailin this chick, but we had a double decker crash and had to get out the ice packs.