Go-Getter Greg. n. (go-get-ter gray-guh).
Code for 'creeper'. Reference to the song "Go-Getter Greg" by St. Louis alt/emo rock band Ludo. Typically used when the creeper is in vicintity or may be able to see the conversation.
Brother: Go-Getter Greg's here. Just came in the door.
Sister: Man, I wish Go-Getter Greg would creep on someone else.