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twincest

/ˈtwɪn.sɛst/noun

twincest is a noun meaning “Incestuous sexual relations between twins, or siblings who look very similar” (English Wiktionary, September 2026). It is spelled T-W-I-N-C-E-S-T, and it appears about once in every 54 million words in written English (wordfreq, 2021 data).

What does twincest mean?

noun

  1. 1

    slangIncestuous sexual relations between twins, or siblings who look very similar.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How do you pronounce twincest?

  • /ˈtwɪn.sɛst/

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-twincest.wav, Wikimedia Commons (author and licence on each file's page).

How common is twincest?

Twincest appears about once in every 54 million words in written English, the 228,409th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Where does twincest come from?

Blend of twin + incest, equivalent to twin + -cest.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).