What is "pig dog"

n. 1 (context Australia New Zealand English) A dog bred to hunt wild pigs and boars, typically based on breeds such as Staffordshire Terrier and English Bull Terrier. 2 (context surfing English) A stance used for surfing tubes on one’s backhand. The surfer crouches low over a bent front knee, back leg extending back, outside hand holding onto the outside rail, and inside arm extended upwards touching the face of the wave as a guide (or digging in to slow down). 3 A contemptible or worthless person. vb. To surf in the '''pig dog''' stance.