Nouns

(n)chump, fool, gull, mark, patsy, sucker, soft touch, muga person who is gullible and easy to take advantage of
(n)gull, seagull, sea gullmostly white aquatic bird having long pointed wings and short legs

Verbs

(v)fool, gull, befoolmake a fool or dupe of
(v)gull, dupe, slang, befool, cod, fool, put on, take in, put one over, put one acrossfool or hoax“The immigrant was duped because he trusted everyone”, “You can't fool me!”