the foggiest idea

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

the foggiest (idea)

n. (even) a hazy idea. (Usually in the negative.) I’m sorry I don’t know. I haven’t the foggiest. See also: foggy, idea