not have the slightest idea

not have the slightest idea

To be completely unaware of or know no information about something. A: "Is Sally off today?" B: "Oh, I don't have the slightest idea. Ask Elaine, she'll know."
See also: have, idea, not, slight
Farlex Dictionary of Idioms.
See also:
  • not give a hang (about something)
  • not give a hoot
  • not give a hoot (about something)
  • not give two pins (about something)
  • (one) doesn't give a rip (about something)
  • don’t give a rip
  • not care a hang
  • not care a hang (about something)
  • don’t give a hoot
References in periodicals archive
If you grew up eating beans only baked or in the occasional bowl of chili, you may not have the slightest idea what to do with them.
Leapin' legumes! Beans come out of the cupboard
They do not have the slightest idea of what lies beyond the windows of the bus.
Awaken to love