not have the slightest idea

not have the slightest idea

To be completely unaware of or know no information about something. A: "Is Sally off today?" B: "Oh, I don't have the slightest idea. Ask Elaine, she'll know."
See also: have, idea, not, slight
References in periodicals archive ?
If you grew up eating beans only baked or in the occasional bowl of chili, you may not have the slightest idea what to do with them.
They do not have the slightest idea of what lies beyond the windows of the bus.
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