by Black ZQ November 28, 2010
A unicorn fuck is a mythical sexual conquest that is claimed to have taken place but did not or a sexual encounter that is desired but almost certainly will never take place.
Example: "Listen Keith, that story you told about that chick from high school you claim you finger-banged behind Shakey's Pizza? She's a unicorn fuck. I checked and her picture isn't even in the annual."
by Red Pepper Lover December 14, 2014