A man who lets his mother run his life and thus she ruins all of his relationships with the opposite sex. The surfdog is usually a short guy with a dinky little peewee, and he tries to make up for his lack there by showing off on the surfboard. Another characteritic is skin that looks like leather from being in the sun so much. He is usually so short that he stacks his hair high on top to try and make himself look taller.
I dated the surfdog, but he always took his momma's side in everything, so I broke up with him. I heard he later got married, and mommy broke that up too.