Double dipping 

While having a threesome with 2 guys and one woman, one guy cums inside and pulls out while the other guy puts it in that same hole.

Man we were double dipping that chick last night.

Double dipping by Biglazyboy94 October 19, 2023

double-handshake clasp 

Refers to where ya grasp da "inside" hands of a couple in your hands, so dat your left and right hands are fully fitted into their corresponding hands, rather than just employing either classic holding-hands clasps or finger-interlacings with their "outside" hands, which would allow them to still hold hands wif each other while they're giving your hands some warm lovies wif their own.

Employing da double-handshake clasp can indeed be delightfully soh-shuh-buhl for all concerned; just be careful dat you don't hold those two hands for so long a time dat you start engaging in inside-hands hogging. If you wanna hold hands wif them for extended periods, smilingly fit their inside hands back into a classic hands-holding clasp after maybe half a minute of holding them yourself, and then take their free outside hands to hold instead.

double-handshake clasp by QuacksO October 19, 2023

Double-Binary People's Day 

Also Double-Binary Visibility Day and Double-Binary Awareness Day.

January 26th.
Origin: International Women's Day and International Men's Day added together

Happy Double-Binary People's Day!

Double-Binary People's Day by Shugunou October 23, 2023

double-stacked handjob 

To use both hands to stroke when giving a handjob.

Last night was crazy, my girlfriend gave me a double-stacked handjob!

double-stacked handjob by SneakierGoat November 2, 2023

Double Q Tip 

Double fisting a girl and sticking you and your best friends penis in her ear.

Everett and Matt double Q tipped Nez’s ear

Double Q Tip by anonymous November 2, 2023

double-digit bird 

A polite sounding nickname for the impolite and badass double-fisted gesture.

As the onetime Insurrectionist in Chief entered the arena with his clueless homies to watch some UFC action at Madison Square Garden, Nia Renee Hill, the wife of comedian Bill Burr, timed her double-digit bird just right for the Jumbotron!

double-digit bird by Dr Bunnygirl November 12, 2023

Double-V 

The only thing the french will ever get right, double-u is stupid, look at the letter W is that UU, No. It is VV.

Alphabet: ... Tee, Yew, Vee, Double-V, Ex

Double-V by Egg Gang the Third November 13, 2023