in no time


Also, in no time at all; in less than no time; in nothing flat. Almost instantly, immediately, as in The train will be here in no time at all, or He'll be finished in less than no time, or I'll be there in nothing flat. All these hyperbolic terms equate a very short time with “at once.” [First half of 1800s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.