3 Answers

Slender Man is perhaps the scariest thing the Internet has ever produced and the Internet is responsible for Meat Spin (I am not giving you a link, goddamn you).
He is a creature of sheer fear. An abnormally tall, skinny humanoid in a suit, with no face to speak of. What's more, he theoretically has the power to either stretch his limbs, utilize shadowy tendrils which can emerge from him, have multiple limbs or all three, it's not clear. Anyone who would really know is either insane or gone or both. It's not really clear.
Other than his appearance, not much is really known to be certain. We think he likes to hide among trees and has a preference to prey on children. What he does with his "victims" it is pretty unclear. Lots of times they just disappear and not even the most relentless hackers of /b/ can track them down. Some stories indicate they turn up on a tree branches like kebabs or in other cases, "hollowed out."

Read more: Slender Man | Cracked.com http://www.cracked.com/funny-6711-slender-man/#ixzz27lytnNlp

I wish

Slender means slim or thin.