catch some z's

• catch some Z's, catch some zs, catch some Zs
• grab some z's, grab some Z's, grab some Zs
• catch z's, catch Z's

From the typical use of Zs in speech bubbles to represent the sounds a person makes when sleeping (especially snoring).

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catch some z's (third-person singular simple present catches some z's, present participle catching some z's, simple past and past participle caught some z's)

1. (idiomatic) To sleep.

   Synonyms: see Thesaurus:sleep

   His boss found him catching some z's at his desk yesterday.