Top Definition
A boner induced by the act or thought of taking another's life.
Also known as a death boner.
"Jon": Rob, I didn't shoot the DJ. But I do have a boner.
Rob: Well "Jon" thats what we federal agents call a "kill boner".
by Count Samizoth October 26, 2010
An experience of sexual arousal from observing or causing pain in another thing. Watching Hostel, seeing a person break an arm or leg, and torturing a dog are all things that will give you a killboner, if you are sick enough.
"Ohh I got such a killboner from watching that terrorist beheading last night!"
by CuthroatMcGee February 18, 2008

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