Mervyn "Skip" Williamson (August 19, 1944 – March 16, 2017) was an American underground cartoonist and central figure in the underground comix movement. Williamson's art was published in the National Lampoon, High Times, the Realist, the Industrial Worker, the Chicago Seed, Encyclopædia Britannica and others. His best-known character is Snappy Sammy Smoot.