not have the foggiest notion

to not know anything at all about something not have the faintest idea I don't have the foggiest notion what that book is about.

Name	Pronounced	Usage
Gioachino	jo-ah-KEE-no	Italian
Oria	-	Italian
Gisela	-	German, Dutch, Spanish, Portuguese
Malone	mə-LON	English (Rare)
Pietra	PYE-trah	Italian
Shantel	shahn-TEL, shan-TEL	English