At one point in the free-wheeling music documentary “Swamp Dogg Gets His Pool Painted,” the eccentric 82-year-old musician is asked to describe his philosophy on life. “Just be cool, you know?,” Swamp Dogg says. “And it’s fun being yourself. That’s fun like a motherfucker. But you gotta find yourself.”
It’s a fitting summary of a creative life lived exactly on his own terms. A cult figure in certain music circles, Jerry Williams Jr. rose to prominence in the ’70s…