big time

big time idiom
  1. An enjoyable or exciting time, as in The children came home exhausted but happy; they really had a big time at the circus. [Mid-1800s]
  2. The highest or most important level in any enterprise, as in I knew that when I made it through the last audition, I was finally in the big time. [Colloquial; c. 1900] Also see big league.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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