Top Definition
When slender man chases his victims. they start to become insane, paranoid, and anti-social, it will get worst up until they get taken away by slender man and never seen again.....
Stuttering Craig: Whats wrong with Ben?
Chad: Slender Sickness.
Stuttering Craig: Dang I feel sorry for him.
Chad: Don't he wont suffer much long.
Stuttering Craig: Why?
Chad: The Slender Man Will get him
by proto man x July 18, 2012

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