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Robert Crumb (born August 30, 1943) — known as R. Crumb — is an American artist and illustrator recognized for the distinctive style of his drawings and his critical, satirical, subversive view of the American mainstream. He currently lives in Southern France with his wife Aline Kominsky-Crumb. Crumb was a founder of the underground comix movement and is regarded as its most prominent figure.

Though one of the most celebrated of comic book artists, Crumb's entire career has unfolded outside the mainstream comic book publishing industry. One of his most recognized works is the "Keep on Truckin'" comic, which became a widely distributed fixture of pop culture in the 1970s. Others are the characters Devil Girl, Fritz the Cat, and Mr. Natural. Image originally published in Zap Comix #0. Drug use. Drug humor.