gull

(noun) a person who is gullible and easy to take advantage of. Synonyms: chump, fool, mark, patsy, fall guy, sucker, soft touch, mug.

(noun) mostly white aquatic bird having long pointed wings and short legs. Synonyms: seagull, sea gull.

(verb) make a fool or dupe of. Synonyms: fool, befool.

(verb) fool or hoax. Synonyms: dupe, slang, befool, cod, fool, put on, take in, put one over, put one across. Examples: "The immigrant was duped because he trusted everyone." "You can't fool me!."