Gargantua and Pantagruel
François Rabelais, in his classic "Gargantua and Pantagruel", often employs the expression "mâche-merde" or "mâchemerde", meaning "shit-chewer". This, in turn, comes from the Greek comedians Aristophanes and particularly Menander, who often use the term "skatophagos" (σκατοφάγος).