Definitions by Gurgal

Twonicorn 

When a unicorn is born with a mutant deficiency that adds an extra horn to its head, thus becoming a two horned unicorn, or twonicorn.

Person 1: I saw a unicorn today!

Person 2: Even better, I saw a twonicorn!

Person 1: What's a twonicorn?

Person 2: A unicorn with two horns.

Person 1: lol

Twonicorn by Gurgal February 25, 2010