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English definition of “have-a-go hero”

have-a-go hero

noun [C] uk   /ˌhæv.ə.ɡəʊ ˈhɪə.rəʊ/ us    /-ɡoʊˈhɪr.oʊ/
UK informal an ordinary person who does something brave in order to try and stop a crime
(Definition of have-a-go hero from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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