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Related to foggiest: fog up, in line with

the foggiest (idea)

Knowledge or understanding of something. Typically used in the negative to show that one does not know something. He does not have the foggiest idea how hard it is to run a business. Where are your keys? I haven't the foggiest.
See also: foggy

foggiest (idea)

Fig. (even) a hazy idea. (Usually in the negative.) I'm sorry I don't know. I haven't the foggiest. I don't have the foggiest idea of how to do this.
See also: foggy
References in periodicals archive ?
The Grand Banks, the body of water off the east coast of Newfoundland, Canada, is considered the foggiest place on Earth.
So why should we be ashamed to admit we love fog, particularly here in the Northwest, one of the four foggiest regions in the country, according to the National Climate Data Center?
I'd like to get some--just to shut her up--but don't have the foggiest idea what the hell it is
On the flip side, many artists haven't the foggiest notion on how to run a business or promote themselves.
So let this space be the first to remind you of this fact: It's May and no one has the foggiest.
And unfortunately, legislators caught up in Juneau busywork may not have even the foggiest notion of what to think or do about the most crucial matter of public policy they will ever face in their entire legislative careers-bar none
Industry officials don't have the foggiest idea what this means.
If we were to interview the inmates of a juvenile justice facility we would undoubtedly find that the majority were moderately well acquainted with the Ten Commandments, but would not have the foggiest notion about evolution.
Stav responded, "One thing is clear: most of the public has not the foggiest notion of what will happen if a Palestinian state arises.
I fear, however, that they won't have the foggiest of a clue what you are on about, but you may get a standard letter thanking you 'blah blah', you are very important to us 'blah blah', we look forward to welcoming you aboard again soon 'blah blah' type of letter back.
But Wills hasn't the foggiest idea about zero-sum games.
Teachers know what's going on in their classroom and their school but few have the foggiest notion about the system of which they are a part.
Court of Appeals for the District of Columbia doesn't have the foggiest idea of what the First Amendment is.
Moreover, there are new clients in the private sector who haven't the foggiest idea what FLSA requires of them, if anything, and who look to their accountant for advice.