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English definition of “I'll be hanged if I know”

I'll be hanged if I know

(also I'm hanged if I know) UK old-fashioned informal
used to say that you certainly do not knowUnaware
(Definition of I'll be hanged if I know from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Translations of “I'll be hanged if I know”

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