Meaning of “not have the foggiest (idea)” in the English Dictionary

English

"not have the foggiest (idea)" in English

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not have the foggiest (idea)

informal

to not know or understand something at all:

I didn't have the foggiest idea what he was talking about.

(Definition of “not have the foggiest (idea)” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)