verb (used with object), verb (used without object)
to cheat, deceive, or trick.
Origin: 1565–75; perhaps < Old North Frenchcoçonner to resell, verbal derivative of coçon retailer (< Latincoctiōnem, accusative of coctiō, cōciō dealer), influenced by Middle Frenchcousin dupe, literally, cousin
1561, perhaps from Fr. cousiner "cheat on pretext of being a cousin;" or from M.E. cosyn "fraud, trickery" (1453), perhaps related to O.Fr. coçon "dealer," from L. cocionem "horse dealer."