have no idea

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have no idea

To not be aware of or know more information about something. A: "Is Sally off today?" B: "Oh, I have no idea. Ask Elaine, she'll know."
See also: have, idea, no

have no iˈdea

,

not have the first, slightest, etc. iˈdea

not know something at all; not know how to do something at all: I’ve no idea what time it is.Don’t ask him to mend it; he hasn’t got the first idea about cars.
See also: have, idea, no