A person that has exceeded the measurable levels of fucktardal asshatery. Their level of stupidity of clearly noticable when they enter the room ... Kind of like blowing a horn announcing their assness.
Wow, my neighbor is a fucking asshorn! But, I would like to donkey punch his daughter.
by DarthHuge July 17, 2008
A tattoo on the small of a girl's back, directly above her ass.
When Rachel bent over, her shirt came up and she showed off her ass horns.
by Dalemite August 14, 2005
imaginary shoehorn-like device used to squeeze an ass into a super tight pair of pants
man, those jeans are so tight she must have used an asshorn to get into them.
by david copeland August 05, 2007