A condition caused by dropping a hit of LSD and waiting for an hour for the effects of the hallucinogen only to be disappointed that the dose was a total dud, so you take another dose and the first dose starts to kick in twenty minutes later, and then twenty minutes later the second dose begins to take effect, and within the next hour you find yourself in the middle of a parallel universe fucking a carnival ride horse that speaks in tongues; usually this state ends in arrest for multiple felonies and a good lesson learned: LSD results may vary.
1st tripper: I totally got purple unicorned last night?
2nd tripper: How come you're not in jail?
1st tripper: The carnival was closed and I just ended up in a pasture fuckin' a cow.
2nd tripper: How was she?
1st tripper: Fine ... until the bull showed up.
Unicorned (verb)--the process of being impaled in some way by a unicorn, usually the horn on its head. There is no proof that this can be done since no-one has ever seen one of these in the first place.
Officer: Your Mom and Dad was recently unicorned yesterday while trying to find the land of unicorns...thus, they had entrusted you everything they had in their will.
Son: O_O......YES! I GET EVERYTHING! THANK YOU GOD!