Unicorn

[Sarah]

Colloquial; Synonym for [hot bi babe] or [HBB], often derogatory, condescending, or ironic. A bisexual person, usually though not always female, who is willing to join an existing couple, often with the presumption that this person will date and become sexually involved with both members of that couple, and not demand anything or do anything which might cause problems or inconvenience to that couple.
The term is often used to be dismissive of a couple seen to be only superficially [polyamorous]. Because of the demands that this type of couple places on the woman (that she be single and not take on any additional partners, and become involved with both members of the couple equally, and often complete their family as a surrogate mother and housekeeper and/or breadwinner and not do anything that may threaten or disrupt the existing couple), many in the poly community call this type of woman a unicorn, as in mythical and not likely to be found, even though there are plenty of bipoly women around.
Sometimes the unicorn is expected to not develop any emotional attachment and is strictly there for a sexual relationship (equally distributed to both members of the [dyad]) and/or is [prescripted] as a secondary. This term is used as a reminder that bipoly women are people with their own desires, needs, and pre-existing lives, and not fantasy figures or pets. See related prescriptive vs. descriptive.

[Justin Bieber]

That girl that you cant catch. Everything about her is so perfect (divine, if you will) getting with her is unfathomable. She is truly a blessing from God. Bumping into her on the sidewalk is a good day. Holding a conversation with her... you were probably dreaming. Anything beyond that - good luck. It takes time, effort, and a whole lot of persistency. But never give up; unicorns are said to be uncatchable, but nothing is impossible. Impossible is nothing. Under no circumstances, never ever, not ever, at no time, should you ever marry a girl who is not your unicorn... Unless you have some super square wheels, then you should look up the word Swamp Donkey. Everyone has a unicorn; its just a matter of spotting her and tracking her down. Give it time, it will happen. For destiny grants us our wishes, but in its own way, in order to give us something beyond our wishes. Good will hunting boiiis.

[Little_Girl]

a magical horse with a horn on the middle o its forehead that missed noahs arks boarding!

[Sonia]

A bisexual but single female in a swingers party.

[Becky]

A mythical species of horse that is extremely hard,if not impossible to catch. Only virgins can come near a unicorn.A unicorns horn is known to neutralize poison, cure any disease, resurrect the dead, and the unicorn itself will choose its companion. If you ever meet a unicorn, if it is not looking at you, or coming near you, forget about being its companion, or even coming near it. If you manage to capture the unicorn, you will obtain immortality. Dont cage in a unicorn when you keep it. It will run away.

[Sonia]

A unicorn is somebody who knows theyre magical and isnt afraid to show it.

[Couch Potatoe]

The rare creature who is able to give you the thing you always wanted but thought you you could never have.

[Sarah]

the most majestical and amazing creature to be in existence ever.

[Couch Potatoe]

A person who seems mythically beautiful and unattainable.

[Ernesto]

A single piece of corn.

[Magaret]

A common swinging term used in the community to refer to a single female interested in meeting other [couples]. Described as such due to the [rarity] of finding said females. By no means derogatory but quite the opposite, a rare treat.
We are interested in meeting other couples and single females - The usual [swinger] couples interest.

[Greta]

A [startup] worth over [one billion] dollars. At risk of becoming [complacent] or stagnant

[Dianne]

A very beautiful, wild and [majestic] horse with a magical horn on its head. Most [unicorns] have very long tail and [manes].