1 definition by The Situation.
Someone who is so void of personality and sense of humor, that they feel the need to steal the jokes of everyone around them. Upon doing so, they then overuse said jokes until the original joke is no longer even funny. This can lead to frustration/violent outbursts for the original joke creator.
"If I hear that Joke Killer mention the threat of the Zombie Apocalypse one more time, I'm going to destroy her".
"Did you hear the one about the unicorn who walked into a bar? Oh yeah, we all did. Joke Killer's been repeating it 10,000 times a day for the past two months."
"Did you hear the one about the unicorn who walked into a bar? Oh yeah, we all did. Joke Killer's been repeating it 10,000 times a day for the past two months."
by The Situation. April 22, 2009