CHUMP
chump, fool, gull, mark, patsy, fall guy, sucker, soft touch, mug
(noun) a person who is gullible and easy to take advantage of
Source: WordNet® 3.1
Etymology
Noun
chump (plural chumps)
(colloquial, pejorative) An incompetent person, a blockhead; a loser.
(colloquial, pejorative) A gullible person; a sucker; someone easily taken advantage of; someone lacking common sense.
The thick end, especially of a piece of wood or of a joint of meat.
Synonyms
• (an unintelligent person): blockhead, idiot, dope, dolt, dunce, dummy
• (a gullible person): gull, sucker, dupe, sap, dummy, patsy, pigeon
• See also dupe
Verb
chump (third-person singular simple present chumps, present participle chumping, simple past and past participle chumped)
Dated form of chomp.
Source: Wiktionary
Chump, n. Etym: [Cf. Icel. kumbr a chopping, E. chop.]
Definition: A short, thick, heavy piece of wood. Morton. Chump end, the
thick end; as, the chump end of a joint of meat. Dickens.
Source: Webster’s Unabridged Dictionary 1913 Edition