Unicorn are mystical creatures which are attracted and could be captured only by a virgin.

In VTuber terms, unicorns are mostly referring to fans (especially male) of female vtuber that who can't accept the behavior of their oshi having significant others or even interacting with any other males, hence keeping their oshi "pure". Compare to gachikoi, unicorns may not have a parasocial relationship with their oshi.
A: I can't believe X the vtuber is collabing with Y the third time this month! What a whore!
B: stfu unicorn
by cottonface July 30, 2023
Get the Unicorn mug.
The sexual act of skull-fucking a horse then shoving your penis through its skull making it look like it has a horn.
boy 1: Hey did you see that? Is it a unicorn???

boy 2: Nah man my friend told me he was going to unicorn a horse.
by Milky~Chan March 16, 2010
Get the Unicorn mug.
A chick with a strap-on in their head
Fi said to Nadia "bitch, ride my unicorn"
by Peniscorn June 23, 2017
Get the Unicorn mug.
A sex position in which a man puts his erect penis in the middle of a woman's forhead and ejaculates.

It can also be the act of drooping a limp penis over the forehead of a woman fom either behind or the front of her face.
Hey, what did you do yesterday?
Oh, I unicorned a few chicks back at my house.
Sweet.
by Period5LunchTable October 26, 2010
Get the Unicorn mug.
(adj.) A term used to describe anyone who is exceptionally naive, especially in their comments, lifestyle, and contacts with other people.

(n.) A person that lacks a real world perspective and wears rose colored goggles; someone that prances around and sees only rainbows, fairies, and gumdrops; A term used to describe most college freshman.
Anna told some of her friends today that she thinks Kyle likes her because he studied with her over the weekend. How unicorn is that?

Just met some of the incoming freshman class. This time tomorrow we are going to be up to our armpits in unicorns!

She is such a unicorn! Last night she came to the apartment and yelled "Hey guys!" When she walked in. Then she started dancing around the room twirling and singing.

-Do you think she will be there tonight? I had better wear my lucky boxers in case she wants to talk to me.
-Dude, quit acting like a unicorn.
by Tarsicius936 November 1, 2011
Get the Unicorn mug.
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
Get the Unicorn mug.
Don't call it a horse; it's a unicorn. It's mythical, magical mysterious, not plain. It has wings like a pegasus and a nice white coat. It grants wishes and prances inthe rain. It came around in 8000 BC. Noah's ark wasn't built b4 it. Do you think its not real? Full house; it's in the background fool. Eating grass all day; partying all night. It'll grant your wish right before your eyes. They hide in your hills and eat all your apples. They also write the facts on youur Snapples. You can thank them later for that.
Person 1:
Hey! Look at that Unicorn!
Person 2:
Hey, where's my apple?
by ;3; April 13, 2011
Get the Unicorn mug.