in a fog

in a fog

Not fully aware or alert; having one's attention clouded with something. I always feel like I'm in a fog when I take that medication. It's like it's hard for me to think.
See also: fog

in a fog

 and in a haze
Fig. dazed; not paying attention to what is going on around one; not alert. Jane always seems to be in a fog. When I get up, I'm in a fog for an hour. After surgery, I was in a haze until the anesthetic wore off.
See also: fog

in a fog

Also, in a haze. Preoccupied, not paying attention; also, at a loss, confused. For example, After the accident he went about in a fog, even though he had not been injured, or Millie always seems to be in a haze; she never knows what's going on. These expressions allude to fog or haze obscuring one's view; the fog usage dates from about 1600, haze from about 1800.
See also: fog

in a fog

in a state of perplexity; unable to think clearly or understand something.
See also: fog

in a ˈfog

(informal) uncertain and confused: Thank you for your explanation, but I’m afraid I’m still in a fog over what happened.
See also: fog
References in classic literature ?
I couldn't tell nothing about voices in a fog, for nothing don't look natural nor sound natural in a fog.
If you think it ain't dismal and lone- some out in a fog that way by yourself in the night, you try it once -- you'll see.
Who that once bends from the line of his march in a fog can tell when or how to find it again
I went for at least a month and stayed a week in a fog and was blown home again in a gale.
We're not drawin' twenty-five fut off Fire Island in a fog.