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1.
A cutesy nickname for the Slender man
"I don't have to worry, 'cause I know Slendy's watching me. No one else sees him, it seems, he follows me in my dreams."
by RaineDrops December 20, 2011
 
2.
An individual seen as creepy or strange, and is thought to resemble Slenderman. This title is not given lightly, it is earned over a long period of time.
Teacher, please don't sit me next to Slendy, he'll kill me.

Don't worry you'll be fine. Jk. That kid creeps me out...
by Slendy;)therealog November 29, 2013