unicorn
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
To participate in a sexual threesome as a bisexual addition to an established heterosexual couple.
Register: slang
Where it’s used:
Used
American English
Examples
Katja*, 27, has unicorned on two separate occasions.
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 “unicorn” mean?
To participate in a sexual threesome as a bisexual addition to an established heterosexual couple.
Is “unicorn” formal or informal?
unicorn is generally slang.