the imagery of the unicorn has been closely associated with Queer culture for a long time, particularly unicorns with rainbow manes and tails.

In Queer slang, a unicorn is also a bisexual person – typically female – that is willing to join an existing couple (predominantly an opposite-sex couple) for sex and fun (either together, or both singularly) without causing any inconvenience to, or having demands of, their relationship. So-called because they “do not, or rarely, exist”. Couples who seek unicorns are known as unicorn hunters.