Fugtuplets 

an especially ugly set of twins

Amy gave birth to some proper fugtuplets.

Fugtuplets by Pratty June 3, 2015

fuctuplets 

Unnaturally large number of siblings born at one (i.e., quadruplets, sextuplets, septuplets, octuplets) created by the abuse of reproductive technology (such as taking too many fertility drugs, implanting multiple embryos). Humans bodies are not built for litters of more than three, and these unfortunate kids are always born prematurely, usually suffer chronic health and developmental problems their entire life, and often die.
Also known as "freaklitters"

"Did you hear about that California woman who's brought her spawn total up to 14 by giving birth to another freaklitter? Those poor fuctuplets"

fuctuplets by ratscabies February 2, 2009

Fuctuplets 

The type of friends who are so close they seem like brother and sister, etc. -
until they sleep with each other.

Those guys are sleeping together? That's so wrong! They're like twins - I guess that makes them fuctuplets.

Fuctuplets by Walking Dictionary Man November 15, 2004

Fagtuplets 

A large congregation of men of the homosexual nature.

Look at all those kids wearing their hats backwards, what a bunch of Fagtuplets!

Fagtuplets by Randal P Johnson August 19, 2010

fucktuplets 

A pair of super annoying twins. Can be identical or fraternal.

Bob: Those twins are being annoying as fuck! Always in my shit...
Gibbs: They are just a pair of fucktuplets!

fucktuplets by Marcle May 9, 2015

Fucktuplets 

A human mother expecting a number of children at the same time that is so high (anything above quadruplets) it qualifies as a litter.

Didn’t Dave tell you? It isn’t just twins this time, we’re having fucktuplets!

Fucktuplets by Nonsensicalme July 5, 2021