not have the foggiest idea

not have the foggiest idea

To have no knowledge or understanding about something. He does not have the foggiest idea how hard it is to run a business. I do not have the foggiest idea where I left my car keys.
See also: foggy, have, idea, not
Farlex Dictionary of Idioms.

not have the foggiest idea

or

not have the foggiest

INFORMAL
COMMON If you do not have the foggiest idea or do not have the foggiest, you do not know anything at all about something. I did not have the foggiest idea what he meant. `How often does it need to be changed?' — `Haven't the foggiest.'
See also: foggy, have, idea, not
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • foggiest
  • the foggiest idea
  • not have the faintest idea
  • not have the faintest/foggiest
  • not have the foggiest
  • not have the foggiest notion
  • hasn
  • put (something) in (one's) head
  • put in head
  • put something into someone's head
References in periodicals archive
By Andrew Amsan in New Delhi WHEN race walker K Ganapathi joined the Army back in 2008, he did not have the foggiest idea about the discipline in which he would go on to become a contender for an Olympic berth.
Ganapathi confident of sealing Rio berth
It is entirely possible that he made yesterday's statement in order to calm things down, after Wednesday's farcical meeting with the party leaders, at which he confirmed everyone's fears that he did not have the foggiest idea what to do about the mounting problems facing the economy.
Our View: Hard to believe the President's reassurances on bailout deal
New teachers certainly know art history and can write a lesson plan, but they do not have the foggiest idea of how to teach in a classroom setting.
Let's discuss it ... in one hundred words or less
The Paolo and Paulo show - Wanchope does not have the foggiest idea what he going to do, Di Canio just gives the impression that he is playing on the edge when, in fact, he is in total control - sliced Leicester apart on Saturday, West Ham having 23 shots at goal, with 11 stabs testing Tim Flowers.
Take gung-ho Hammers to down Metz
But like the majority of youngsters, (if they are honest), Fiona Skinner did not have the foggiest idea.
Happy Ending