not have the slightest idea

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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 ?
htm) Floyd Mayweather Says Sorry to UFC's Ronda Rousey After Not Having the Slightest Idea Who She Was
Everyone stands around celebrating while the subject of the party sits there gurgling and not having the slightest idea what the hell is going on.
One of them for making absolutely no attempt to win it, the other for not having the slightest idea how to.
On the other hand, I do get the occasional lapse of memory, though it's usually to do with things such as running out to the garage to fetch something then not having the slightest idea what for when I get there.
Looking at the word, not having the slightest idea what it might mean, my guess was it might be something happy, a happy, dappy, fa-la-la ring to the word, something maybe to do with music, bells and tambourines and drums and long curvy goat-horns, you know, kind of stuff they play music with in the Bible days movies.