You are a repulsive little freak whose origins are unclear. Your head is small for a goblin and your mouth oddly narrow, allowing you to pass in urban environments as an unidentifiable mongrel, providing you keep a low profile. However, if examined closely, your goblin origins are revealed.
Pathfinder Player Companion: Goblins of Golarion. © 2011, Paizo Publishing, LLC; Author: James Jacobs, Hal Maclean, and Richard Pett.