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English definition of “sucker”

sucker

noun [C] (THING/PERSON)    /ˈsʌk.ər/ US  // US informal
used to refer to a thing or person that is unpleasant or difficult: I've been working on that paper for weeks and almost have the sucker finished. He's a nasty little sucker, isn't he?Difficult things and peoplePreventing and impeding
(Definition of sucker noun (THING/PERSON) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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