not a moment to spare

not a moment to spare

At the last possible moment before it is too late; just in the nick of time. Quickly, you have to shut down the reactor—there isn't a moment to spare! A: "The surgeon has just arrived." B: "And not a moment to spare! This patient needs an operation immediately!"
See also: moment, not, spare
Farlex Dictionary of Idioms.

not a moment to spare

 and without a moment to spare
just in time; with no extra time. Hurry, hurry! There's not a moment to spare! I arrived without a moment to spare.
See also: moment, not, spare
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • without a moment to spare
  • not a moment too soon
  • just now
  • the moment (that)
  • at this moment in time
  • at this moment
  • at the moment
  • moment of truth
  • moment of truth, the
  • the moment of truth