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2.
To put one's thumb in a woman's vagina
Dude, I totally hornered that chic last night
by Señor word July 20, 2013
 
1.
One who uses the car horn excessively.
I hate getting stuck in front of some horner who thinks he can move my car with the might of his sound waves.
by Pat Lambeth and Laurie Ramsey April 25, 2008
 
3.
An individual who is obsessed with Dabney Coleman movies.
"You want to watch Cloak and Dagger AND 9 to 5? Your such a horner!"
by Jay-Doggg July 03, 2006