His several years working as a customs officer led to his famous nickname, "Le Douanier [DWA-nyea]."  
In 1908 Picasso gave a famous banquet, half-serious half-burlesque, in this artist's honor.  Among his humorous paintings are The Football Players and Boy on the Rocks, mostly for their gross distortions.  Because of his lack of formal training, he was grouped with the Naives or the Primitives, but those labels vanished with such brilliant canvases as A Carnival Evening and The Snake Charmer.  His several years working as a customs officer led to his famous nickname, "Le Douanier [DWA-nyea]."  FTP, name this French painter whose fame rests in his exotic jungle depictions and the painting known as The Sleeping Gypsy.
In 1908 Picasso gave a famous banquet, half-serious half-burlesque, in this artist's honor.  
Henri Rousseau (prompt on just last name)