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1.
Verb:
A) To leer at someone sexually.

B)To look at someone with sexual thoughts.

C) To act like a sexual perpetrator
Dude, Joy is wearing a low-cut shirt today. When she leans over you can almost see everything - I'm totally perping her.
by El Duce October 06, 2004
 
2.
To act like you don't know something.
George why you perping like you don't what went on last night?
by Tammie February 14, 2005