Some catch

"Some catch" means that that person is very good looking and would be a great girlfriend/boyfriend.

That girl Sophie is some catch

catch some z's

to sleep (the zzz in the word bubble over sleepers heads in comics).

I'm going to catch some z's before I go to work.

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catch some rays

to lie or sit outside in the sun

I thought I'd take my lunch outside and catch some rays.

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Catch some fish

Gender neutral way of saying that you will be having sex.
Akin to getting some pussy/dick.

"Hey, is Tom coming to the party on Friday?"
"Nah, he had a real nice date last night and is hoping to catch some fish on Friday."

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Catch some Zs

(idiom) Go to sleep

Aa Bb Cc

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catch some zeds

Simply means, just trying to get some sleep.

Damn...I haven't slept for 36 hours, I'm going to try to catch some zeds.

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catch some smoke

A person who says this usually wants to square up or fight.

Man 1: You trying to catch some smoke?
Man 2: No smoke please.

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