Gilbert Shelton (born May 31, 1940, Houston, Texas) is an American cartoonist and underground comix artist. He is the creator of "The Fabulous Furry Freak Brothers", "Fat Freddy's Cat", "Wonder Wart-Hog", "Not Quite Dead" and the cover art to The Grateful Dead's 1978 album "Shakedown Street". He graduated from Lamar High School in Houston.