Following in the tradition of "the Dirty Sanchez", this is a sexual act. This can only be done to a girl with hair at least 8 inches long. While she is sleeping you ejaculate in her hair, aiming to the front, specifically. Then, take a small clump of her hair,a t the very front and center, and pull it straight up till it's taut. Rubbing the seminal fluid and holding the hair until it dries, she will wake up with her hair resembling that distinguishing feature of a unicorn.
My girlfriend was being incredibly rude, and I was sick of it. So after she fell asleep, I rubbed one out and gave her The Unicorn and left for good.
by your ex November 20, 2007
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The act of running around naked with an erection.
This guy got so drunk last night, i saw him unicorning through the street!
by Unicorners August 19, 2011
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The Romans called what we now know as rhinoceros a "unicornus".
Later, they evolved into two species:
1. the white unicorn (of horselike appearance with one beautiful horn on the center of its head)
2. the pink unicorn (of unknown appearance, as it is invisible)
Plinius: Look, a unicorn. What impressive and massive legs!
Walt: Oh, it's lovely! Well, if I draw it as a white horse with a horn...
Scott: I don't believe in unicorns. Besides, it's pink.
by yuuutsuna July 11, 2008
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A person who seems mythically beautiful and unattainable.
I'd had a crush since I was 13; she was my unicorn.
by S.I. Cake June 8, 2005
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something once in a lifetime, rare, dope, unique, one of a kind, so beyond special that discovering/experiencing it for the first time blows your mind.
1.) She unzipped his pants and found a unicorn.

2.) I drank the unicorn of beers last night.

3.) That moment was so fkn unicorn!

4.) Meeting you was like finding a unicorn. hk<3
by luvst0ned October 17, 2014
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A sexual position where the man puts a strap on onto his forehead, and pleasures his woman with it.
Justin did the unicorn last night.

Sounds mystical.

Not really...
by damn justin July 25, 2008
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adj; possessing unicorn like features and, or actions.
John was acting so unicornal today.
by RS&HJ October 3, 2011
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