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on the fly

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In a hurry, on the run, as in I picked up some groceries on the fly. The transfer of this expression, which literally means “in midair or in flight,” dates from the mid-1800s.

QUIZ
QUIZ YOURSELF ON OPPOSITES OF RED BEFORE YOU TURN SCARLET
We have a challenge that will make you blush: do you know the many words and ways to describe the opposite of red?
Question 1 of 7
Which of the following colors is used to symbolize AIR?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use on the fly in a sentence

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