Top Definition
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.
John wants a single, attractive woman who will love and have sex equally with him and his wife, but not interfere with their marriage, move in together, help raise their kids but not have any of her own, and not have any other partners. He's looking for something that doesn't exist - he's looking for a unicorn!
by Joreth April 08, 2010
1. A mythical beast whose ejaculate consists of flaming rainbows

2. A girl whose a virgin, usually in college.
1. John- "Unicorns are made of epic fucking win man, they cum flaming rainbows."

Doug- "Dude, you are so full of shit....."

John- "But its true... I SEEN IT!"

2. Phillip-"I hear that girl in physics is a unicorn"

Bobert-"Jenny? No way man, shes a horse".
by a pirate June 18, 2009
The male version of 'cougar.' An older gay or bisexual man hitting on a younger man. They are called unicorns because they are horny and pretty.
I was watching the game at a bar, and this hottie hot, clearly in his late 40s, came and started hitting on me. Such a unicorn! rhino manther cougar
by MikeByson January 11, 2015
A male with an erection
John is such a unicorn. He's always walking around with an erection.
by Alexx P March 24, 2014
The act of having sexual intercourse with an individual of any gender without the use of a condom.
What's it like having sex without a condom?

It's a lot like seeing a unicorn. You're really excited and you want to ride the unicorn. But afterwards after you bust in it's face there's a strong sense of guilt for degrading such a beautiful creature.
by Unicorn Enthusiast March 29, 2014
The assumption that good women are hard to find, like unicorns
-Hows things working out with you a Courtney bro?

-Not too good, thought I had a unicorn but turns our shes just another skeezer

by JW14 April 13, 2009
A mythical creature typically represented as a single mother that doesn't use Government assistance.
Even though being a single mom was tough, Janet worked hard to get a degree so she could get a high paying job and become a unicorn instead of a freeloading, street urchin.
by Q-City Wordsmith December 12, 2013
As rare a real unicorn is. This fascinating sexual experience is when a female giving you fellatio starts to migrate south to your butthole. As she tosses your salad she begins to jerk your member. At this specific moment, she resembles a unicorn polishing her horn (your penis). Yes, it is as magnificent, rare, and pleasurable as it sounds. I would recommend that if any of my fellow alpha males find a women that expresses her love of the unicorn that you wife her IMMEDIATELY. Enjoy!
While the fugazi started to give me head, she went down, started eating my ass and jerking me off and the same damn time. I unicorned that bitch bro!

Female: Hey baby! Make me into a unicorn!
by Tugey November 24, 2013

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