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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

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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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Taboo sex position where a male places his penis in the center of partner's forehead
"Dude how was your weekend?"
"Awww u know chillin' Unicorned some bitches'
by LarcenyOf MoneyStax October 26, 2010

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Someone who tells crazy stories about when they were drunk or partying, but nobody actually sees them partying ever.

A kid who tries to make himself look like a god by telling crazy stories that are complete bullshit.

Someone who talks themselves up to fuck mad bitches, but nobody sees them hook up with anyone.
Unicorn- dude when I was with my boys, their so crazy, we got arrested for pissing on some guys porch, we were so drunk, i remember everything. I hooked up with an Asian chick, i was wasted.

You- this kid is so full of shit, hes a fucking unicorn
by Dillallo95 March 29, 2010

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A Unicorn is a gentlemen of African American decent that plays professional hockey in the United States of America. They are called such because it is such a rare occurrence to spot one in the NHL that their mythic status is often compared to the fabled Unicorn.
Bro #1: Bro we went to the hockey game and I saw a Unicorn
Bro #2: No way I thought those didn't exist
by Oston from Evers April 18, 2011

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Synonym of the term "stag," as in going to a school dance or any of the similar occasions without a date.
I got rejected by 6 girls so I was forced to go to Winter Formal unicorn.
by coupdegrace February 06, 2010

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An extremely attractice redhead; possesses a mythological status due to the fact that finding a unicorn is rare but having the opportunity to ride one is even rarer.
Rose McGowan is a unicorn.

Nick: Dude, I hooked up with Rachel last night.

Zach: No way! You hooked up with the unicorn!?

Nick: Yea dude. We were drinkin beer and the next thing I know, she had her mouth around the tip of my penis. Then I took her back to my place and gave her the Tony Danza.
by Private Bitchass February 05, 2009

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An individual who is half Jewish. It is derived from the myth that Jewish people have horns (a biblical misreading) and as such, an individual with only half authentic Jewish ancestry, has only one horn...hence a Unicorn.
My mother was raised dutch-reform, but my father is Jewish, so I'm pretty much a straight up unicorn.
by communistashes. October 29, 2008

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