To stick an enemy in Halo 3 with a spike grenade so that it sticks out of their head giving them the appearance of a unicorn.
by MNetLucas November 2, 2008

by sueeey June 17, 2013

Wearing a rubber mask and posing in front of national monuments, cruising through inappropriate venues (funerals, banks, day care centers), dancing at musical festivals, sight-seeing, doing tourist stuff and also everyday things like going to Costco to get samples of food.
Unicorns unicorn unicorn armyunicorning extremeunicorningunicornheadunicornmaskunicorns4lifeUnicorning4lifeTheUnicornArmyunicornarmy
by TheUnicornArmy September 6, 2013

the best things in the universe pink fluffy glittery magical farts cotton candy barfs rainbows and awesome
by Glitter ✨ girl January 2, 2018

by hey i have crippling depressio May 8, 2018

Taking a shit in a Pringles can and sticking it to someone's windshield of their car. (Making their car a unicorn)
We bough a bunch cans of Pringles and once they were gone were went around Unicorning every car in the parking lot.
by HelenKellerxxx May 14, 2016

by Trickle16 September 1, 2018
