not with it

not with it

Not thinking or speaking clearly or coherently; not alert, responsive, or fully conscious. Sorry, I'm not really with it yet. Let me get a cup of coffee first. I tried getting you to leave the party last night, but you weren't with it at all.
See also: not
Farlex Dictionary of Idioms.

not with it

not able to think clearly; not able to understand things. Lisa's mother is not really with it anymore. She's going senile. Tom's not with it yet. He's only just come around from the anesthetic.
See also: not
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • not for a second
  • not for a minute
  • not for a moment
  • aint
  • ain't
  • be not much cop
  • not for a/one minute/moment/second/instant
  • not for a instant
  • by no means
  • not by any means