z's
or Z's
[zeez]
noun (used with a plural verb) Slang.
sleep (often used with grab, catch, etc.): to grab some z's before dinner.
Origin of z's
First recorded in 1960–65; from the conventional use of a series of z's to represent snoring
Z, z
[zee or, esp. British, zed; Archaic iz-erd]
noun, plural Z's or Zs, z's or zs.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019