have no idea

have no idea

To be completely unaware of or know no information about something. A: "Is Sally off today?" B: "Oh, I have no idea. Ask Elaine, she'll know."
See also: have, idea, no
Farlex Dictionary of Idioms.

have no iˈdea

,

not have the first, slightest, etc. iˈdea

not know something at all; not know how to do something at all: I’ve no idea what time it is. Don’t ask him to mend it; he hasn’t got the first idea about cars.
See also: have, idea, no
Farlex Partner Idioms Dictionary
See also:
  • I know
  • as we know it
  • ask me another
  • ask me another!
  • a closed book
  • closed book, a
  • AFAIK
  • know what
  • before you know where you are
  • be in the dark