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
Katlego	-	Southern African, Tswana
Aubree	AWB-ree	English (Modern)
Henrietta	hen-ree-ET-ə (English)	English, Hungarian, Finnish, Swedish, Dutch
FİKrİ	-	Turkish
Keren	-	Hebrew
Briscoe	BRIS-ko	English (Rare)