not have the faintest idea(redirected from not have the foggiest idea)
not have the faintest ideaalso not have the foggiest idea
to not know anything at all about something not have the foggiest notion I didn't have the faintest idea where I was or which way I was going – I simply knew I had to get away. These people don't have the foggiest idea what America's really like.
Usage notes: also used in the forms I have no idea and I haven't the slightest idea