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1.
Originating from the action of raising one's hand in class with the forefinger and thumb in an L shape.

To Ken someone, or to be Kenned, involves the thrusting of a hand in the aforementioned shape in or on someone's person, usually in the facial area.
"That guy keeps Kenning the teacher."

"Quit Kenning my face already!"

"You've just been Kenned!"

"Kenned is a word I can spell. lol."
by Lupus Richtoven March 13, 2008
 
2.
When someone with the name of Ken completely and utterly verbally rapes you
You just got Kenned - You just got owned
by kennytheledgend May 29, 2012
 
3.
A popular new age form of screwing up the coding on a website, meaning that the page begins to function incorrectly and works significantly different to the design.
The webpage design looked great until it got kenned
by peterlowe February 28, 2012