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English definition of “dobber”

dobber

noun [C] uk   /ˈdɒb.ər/ us    /ˈdɑː.bɚ/ Australian English informal disapproving
a person who secretly tells someone in authority that someone else has done something wrongPeople who reveal secrets and tell tales
(Definition of dobber from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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