gull
Cross references: 1. dupe 1. gull \'g*l\ n [ME, of Celt origin; akin to W gwylan gull] : any of numerous long-winged web-footed aquatic birds (family Laridae); (Xesp : a largely white bird (as of the genus Larus) that differs from a tern in usu. larger size, stouter build, thicker bill somewhat hooked at the tip, less pointed wings, and short unforked tail 2. gull vt [obs. gull gullet, fr. ME golle, fr. MF goule] : to make a dupe of : DECEIVE 3. gull n : a person who is easily deceived or cheated : DUPE
Webster's English Dictionary