Just try posting in a polyamory group asking who identifies as a unicorn and you’re in for a bumpy ride. You need not be in the polyamorous community long to become aware that it is a hotly contested term with negative connotations. Generally it is used to describe a single bisexual female willing to become sexually and/or romantically involved with a couple that is usually comprised of a heterosexual man and a bisexual woman. “Unicorn.” One of the first terms of the polyamorous lexicon that I encountered upon entering the non-monogamous world.