Word.ws English Dictionary

sibcest

sibcest noun: sexual or romantic relations between siblings.

Noun

sibcest (uncountable)

  1. (rare) Sexual or romantic relations between siblings.
    • There's no word yet on if this modern-day version of Cruel Intentions will have any sibcest, but if Cruel Intentions is any indication, this series will be sure to have some jaw-dropping moments.2015 October 22, Khadija Dukes, “Cruel Intentions TV Series In the Works”, in Paste Magazine
    • Sibcest! Orgasms! Annalise picking out sexy dresses! Sex was on everyone’s minds this week, and not just because of the case-of-the-week’s client in peril: a holistic sex worker who founded her own sex party-throwing clinic, only to be put on trial when one of her clients has a heart attack...2015 October 9, Marc Sneticer, “'How to Get Away with Murder' recap: 'It's Called the Octopus'”, in Entertainment Weekly

Examples of sibcest in a sentence

  • This coerced sibcest plotline is seriously disturbing, and paints Jenna as one of the show's most disturbed villains.2015 November 30, Kaitlin Reilly, “11 Times 'Pretty Little Liars' Got A Little Weird, Because We Can Never Forget Those Masks”, in Bustle:
  • The Keating clan did make headway on the Hapstall case, though; Catherine (Amy Okuda) is a virgin, meaning she isn’t sleeping with her half-brother and the term “sibcest” can be put to rest.2015 October 16, Dana Rose Falcone, “How to Get Away With Murder’s Billy Brown on ‘Skanks Get Shanked’”, in Entertainment Weekly:
  • The modern day adaptation of Jane Austen's Emma is sprinkled with romance (how cute are Cher and Josh, despite the step-sibcest thing?2016 January 27, Kaitlin Reilly, “17 Movies On Netflix To Watch If You're Single This Valentine”, in Bustle:

Origin of sibcest

From sibling + -cest.

Questions about sibcest

What does sibcest mean?
Sibcest means sexual or romantic relations between siblings.
How do you use sibcest in a sentence?
This coerced sibcest plotline is seriously disturbing, and paints Jenna as one of the show's most disturbed villains.
What part of speech is sibcest?
Sibcest is a noun.

Words near sibcest in the dictionary

  1. sibbens
  2. sibber
  3. sibberidge
  4. sibbest
  5. sibbing
  6. sibcest
  7. Sibe
  8. sibeh
  9. sibei
  10. Sibelian
  11. sibenadet

Source and license

Adapted from Wiktionary: sibcest (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-sibcest.wav.

Cite this entry: “sibcest.” Word.ws, https://word.ws/sibcest. Based on Wiktionary, CC BY-SA 4.0.