catch some z's

Idioms & Phrases

catch some z's

Take a nap, go to sleep, as in I stayed up all night studying so I'd better catch some z's. This term alludes to the buzzing sound of snoring. [Slang; second half of 1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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