Rooted in the expression: "Hung like a horse", a Unicorn Dick or UD, refers to a exceptionally large penis with the magical powers of a Unicorn. These powers include: making women sneak out of bed with men they are dating in order to pursue the UD, making women jump from man to man looking to fill a void that only a UD can fill, and making women lie straight faced to a man they allegedly care about when confronted about sneaking out to pursue the UD.
I don't understand why she is with him, he has no job, he treats her like shit, and he spends all her money.

He must have a Unicorn Dick.

Whatever dude, Unicorns aren't even real.
by autobrick December 25, 2009
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The object that you rub on your vagina on your period or any other bleeding part of the body to stop the bleeding while your listening to a lager amount of Ke$ha when your drunk, high, or both.
DUDE FACE!!! WE SOOO NEED TO GET A BABY UNICORN DICK, KE$HAS NEWEST ALBUM, AND SOME WEED, I JUST GT SHOT IN THE FUCKING HEAD AND I STARTED MY PENIS PERIOD!!!
by BLACKPARADEZOMBIE May 22, 2011
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person 1:wow did you see that giant unicorn rainbow dick.

person 2: yeah it was fucking huge
by DLAB09 August 13, 2011
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When you cut someones dick off and sew it to there head. Therfore resembling a unicorn with a floppy horn.
I'm going to make you a limp dick unicorn!
by 100%Real May 6, 2015
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When you cut someones dick off and sew it to there head. Therfore resembling a unicorn with a floppy horn.
I'm going to make you a limp dick unicorn!
by 100%Real May 6, 2015
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A Big Dick Unicorn is a man who is incredibly thoughtful, is dynamite in bed, and has a gigantic dick. He can be found in a rare, once in a lifetime hookup that you’ll never be able to forget, no matter how many other men you sleep with in the hopes of recapturing the glory of that night.
Ah, yes, I remember my Big Dick Unicorn. I met him in a drunk St. Patty’s Day blur on a business trip to Boston. It’s been ten years and I still think about that night.
by NobodyWantedThisName May 27, 2020
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When you rip off someone's dick and attach it in some form to someone's forehead.
I will cut off your dick and attach it to your head so that way you'd become a floppy dick unicorn you cunt.
by Not Ronnie March 28, 2017
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