I gotta catch some Z's before I drop.Why don't you stop a little bit and try to cop some Z's?
Idiom
cop some z'scatch/cop/get some z's
American, informal to sleep.
All I want to do is go home and catch some z's.
cop some Z's
To get some sleep. In illustrations such as comics, three (or more) Z's are often used to represent sleep or snoring. We've got a pretty long layover before our next flight, so I'm going to try to cop some Z's at the gate.Jeff's upstairs copping some Z's. It's been a hard week for him.