at the drop of a hat
Immediately, without delay, as in We were ready to pack our bags and go on vacation at the drop of a hat. This phrase probably alludes to signaling the start of a race or other contest by dropping a hat. [Late 1800s]
Words Nearby at the drop of a hat
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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