twincest
noun
- incest between twins
Wiktionary
Pronunciation: /ˈtwɪn.sɛst/
noun
Etymology: Blend of twin + incest, equivalent to twin + -cest.
- Incestuous sexual relations between twins, or siblings who look very similar.
“This one's about gay brothers. I'm calling it Twincest. Nice, no?”
“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)...”