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2.
When a creeper is creeped out by what he/she does.

This is different than creepy which is when the victim feels creeped out.
Guy: I can't believe I have a lock of her hair. Creepery!
by creepery August 12, 2013
 
1.
The art of creeping. It can apply to Facebook, or life in general. This goes beyond your common, every day kind of creeping. It is creeping...to the max.
Sarah- "I met that guy ten minutes ago at a party and he just requested me as a friend on Facebook."
Amy- "So?"
Sarah- "I didn't even tell him my name......"
Amy- "Woah that's some major creepery."
by Kikipania May 01, 2010