Adjective. When some when is so useless or incapable of doing anything. The person cant put on their own clothes, or just answer a question to a quiz or test or follow basic instructions. They are like almost retarded without the mental handicap. It does not have to be physical. Someone could be dumb at a subject. Or someone is lacking on a school project. Maybe they are just assholes. This term can be used for almost anything at this point. Just like fuck. Fuck can be used for anything. Keller is the new word that I hear alot of people saying.
Kenny - lily didnt do her work for the project tomorrow.
Kevin - Shes useless.
Kenny - shes so keller
by Au KJTR ftw April 12, 2015
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To be completely blind-sided and dumb-struck by something that happened.

similar to pwned and reeved
Paul was kellered when he fell down the flight of stairs.
by Steve Jorgensen July 14, 2006
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the one man band. should be everyone's hero!
Burned Out Hippie: Dude, Keller rocks!
Burned Out Hippie's Friend: Yeah, wanna hit this bowl?
Burned Out Hippie: cough cough Those are some headies.
Burned Out Hippie's Friend: This is "the best feeling in the world."
by MACKATTACK January 26, 2005
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1. A KELLERS MOUSTACHE is when a male performs oral copulation upon another man, in a manner that is more homoerotic than normal homosexual acts.

2. A mustachioed gentleman who has an insatiable craving for the taste of another man's ejaculate.
I couldn't afford any more points on my license so I had to give the cop with the German accent a Kellers Moustache.
by Espaldas Rompio February 17, 2017
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A bunch of good ole boys raising hell and fucking bitches. A city near Fort Worth that is high class mostly white. This city is known for having the hottest girls and the shittiest football team. But the kids from keller go harder then any other town. Whiskey pours and beer chases. Great place to call home.
"Hey what are you doing after the game?"

"Getting drunk as shit it's keller texas"
by Ktown1212 November 4, 2013
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