Meanings
- slanguncountablelifestyleIncestuous sexual relations between twins, or siblings who look very similar.
This one's about gay brothers. I'm calling it Twincest. Nice, no?
1985, Joseph Hansen, A Smile in His Lifetime, New American Library, page 643 more examples
As 'twincest' is in (a trend started by Parker Posey and Josh Hamilton in The House of Yes, to be released in the UK in 1998)...
1998, Film Review: Special: Year Book 1997/98, Visual Imagination Ltd., page 117These pieces you might very well be able to relate to even if you've never been horny for twincest, had an affair, or been a black man...
2007, Rachel Kramer Bussel, Best Sex Writing 2008In the course of one of his climbs, he hears adult voices through a high window, goes to investigate, and comes across Jaime and Cersei energetically engaged in (to use a neologism popular with fans) twincest.
2013, John Lancaster, “When did you get hooked?”, in London Review of Books, volume 35, number 7
Origin
Blend of twin + incest, equivalent to twin + -cest.
Full word history & related roots →Rhymes & wordplay
Rhymes with twincest
All rhymes →Cite this entry
twincest. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/twincest
“twincest.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/twincest. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “twincest,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/twincest.
Source: twincest on Wiktionary, CC BY-SA 4.0.