Twincest

//ˈtwɪnsɛst// noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun

1
Incestuous sexual relations between twins, or siblings who look very similar. slang, uncountable
"This one's about gay brothers. I'm calling it Twincest. Nice, no?"

Example

"This one's about gay brothers. I'm calling it Twincest. Nice, no?"

Etymology

Blend of twin + incest or twin + -cest.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.