The act of tying together 2 sexual partners of the same gender for a threesome.
“Hey Ellie, my girlfriend wanted to try doing conjoined twins tonight, you still up for that threesome?”

“Only if I get to be the left side!”
by SexGuru89 April 6, 2023
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A Pair of sad MOFOs that are stuck together
i saw a conjoined twin pissing out of the same #$#!@.
by Colin F. November 5, 2003
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A FICTIONAL, PARODIC disorder created by the writers of Southpark, the animated television show. This faux illness is used to exemplify how people can be unsupportive while trying to be supportive (and more simplistically, how people should mind their own business. It is logical to assume they did this to avoid offending any sensitive people with a real disorder, so they used one that didn't exist.

In real conjoined twins, there is the potential for something similar to occur, though not often on the face, called "twin embolisation syndrome" or "vanishing twin syndrome." Also visually similar to the imagined South Park disorder are craniopagus parisiticus (parasitic twin) and twin reversed arterial perfusion (TRAP).

Please note:
"conjoint" is not an acutal spelling used by the writers or by medical professionals, merely by people with poor spelling skills adding things to an open dictionary.
"Did you see that hilarious episode of South Park where they talked about 'conjoined twin myslexia?' My how we would look ignorant moron if we actually used the term like it was really a disorder."
by Lady Artemis August 15, 2009
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When the Chinese Danny DeVito finds out his brother is the Black Arnold Schwartzenegger in Chernobyl, because they are an example of conjoined biracial twins.
by dave cable February 5, 2010
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