selfcest
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Sexual activity with an alternate version of oneself, such as a clone, duplicate, alter ego, or a version of oneself from a different time or alternate universe.
Register: slang
Where it’s used:
Used
American English
Examples
And this is where selfcest comes in. For those unfamiliar with Adventure Time, it has two series: the main, phallogocentric one, Adventure Time, and another spin-off version, Adventure Time: Fionna and Cake, in which gender-flipped versions of the original characters are presented. Marceline spawns
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “selfcest” mean?
Sexual activity with an alternate version of oneself, such as a clone, duplicate, alter ego, or a version of oneself from a different time or alternate universe.
Is “selfcest” formal or informal?
selfcest is generally slang.