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general::
Phrase(s): catch some Zs [and] cop some Zs; cut some Zs
to get some sleep. (In comic strips, Zs are used to show that someone is sleeping or snoring.) • I gotta catch some Zs before I drop. • Why don’t you stop a little bit and try to cop some Zs?
McGrawhill's American Idioms And Phrasal Verbs