Definitions by The Diego Cortes

unicorn 

(v) to headbut the bottom of a beer bottle while someone is drinking and drive the bottle into their teeth.

We used to think that it was funny to unicorn each other at parties until we chipped a friend's tooth.

or

Last Thanksgiving, my aunt accidentally unicorned my beer bottle and made my gums bleed.

unicorn by The Diego Cortes November 28, 2011