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English definition of “vermin”

vermin

noun [plural]     /ˈvɜː.mɪn/ US  /ˈvɝː-/
small animals and insects that can be harmful and are difficult to control when they appear in large numbers: Flies, lice, and cockroaches can all be described as vermin.General and informal words for animals offensive disapproving people who are unpleasant and harmful to society: He thought all terrorists were vermin.Unpleasant people in generalUnpleasant men
(Definition of vermin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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