you snooze, you loose.

you snooze, you loose 너가 잠들면, 잃게 될거야

Gramatically 'if you snooze, then you loose.'

To snooze means to sleep.If you sleep, then you loose !

If you are sleeping / if you are not paying attention / if you are complaining / if you are not focusing, then you will the chane or the opportunity.

A: Ugh~ Twitter's stock is up 10%

B: You didn't buy?

A: No, I wasn't sure.

B: You snooze, you loose.

A: 어~ 트위터 주가가 10%나 올랐네.

B: 안샀어?

A: 응, 확실치 않았어서.

B: 너가 잠들면/집중안하면 , (기회를) 잃게 될거야.