A sexual act where as a female is giving fellatio to a male, the female surprisingly inserts a dildo into the male's rectum
Jenny was still bitter about John giving her the shocker, so she decided to get back at him by giving him a unicorn surprise.
by WichitaStateFan April 5, 2010

by The Lenny Dee November 10, 2010

by Katzumi May 26, 2010

The act of placing a head massager on your head and repetitively ramming the other end against a vagina or an asshole. Pleasurable sensation is produced in both.
Dude #1: Yo man I'm beat, I think I'm going to go and choke the chicken.
Dude #2: Lame, let's do something!
Dude #1: ...Want to ride the unicorn?
Dude #2: Sick brah!
Dude #2: Lame, let's do something!
Dude #1: ...Want to ride the unicorn?
Dude #2: Sick brah!
by spark_rider October 21, 2010

This is when a girl, out of sheer anger, starts banging her head against a wall. Only, instead of a wall, it is another girl's vagina.
Whoah, Terrence made that girl so mad that she gave the hornless unicorn to everybody in Michigan. I wonder what he did.
by pozzletoff September 4, 2005

by Dr. Chovorkiean? October 29, 2009

When a man and a woman or a man and a man have intercourse right before man A achieves orgasm the reciver gets under man A and places his genitallia on there forged and makes a unicorn like horn. Man A proceeded to orgasm and shoots a white rainbow off the horn.
by Mcswaggfirenuts March 9, 2015
