1. acronym for Pretty Girl
-gorgeous, attractive, smart, hott, cute lady
2. also stands for Pilipina Girl
-a native girl from the Philippine Islands.
3. acronym for Perv Girl or Pervert Girl
-a term you use on an innocent sweet woman but you realize that she's also a closet horny, playful, naughty dudette.
4. -definitions of 1, 2, and 3 combined
Aisha: "I love you too, Brian! And you're my P.B.!"
(for the meaning of P.B., please look up P.B. in the urbandictionary).