Party twins

A paring between friends, who always attend social events together. In no way related.

(At an event)
Stranger: "we always see those two at GREAT JOB, they must be party twins"

by Skyewalker April 17, 2015

Third twin

The backup twin

"You must be the third twin of the family"

by MShadow2016 August 12, 2016

Mirror Twins

Mirror Twins are twins that are literally mirrored versions of each other. Even their internal organs are mirrored.

Fred and Zack are Mirror Twins. I can't tell them apart.

by TheBlueHedgehog October 26, 2015

poop twin

A poop twin is when you and a friend always have to poop at the same time or around the same time

Alana: I have to poop so badly

Hayden: omg I just pooped

Alana: poop twins!!!

by nameable April 6, 2016

Norwegian Twins

Siblings that are approximately 18 months apart, because Norwegians are more sensible than the Irish, and can use birth control.

Oh, your kids look so close in age, they must be Irish Twins. Good Lord No! They are Norwegian Twins

by Яif-San June 26, 2019

Paternal twins

To children with the same gender and who the same birthday P.S the are really rare!

Hey you see those girls over there

Ya why?
There paternal twins

by Gray grace m November 9, 2019

Twin Cities

What a man calls another word for tits.

I love I see my partners twin cities.

by ShawnyD20 May 22, 2019