What “Bruk” means
Bruk is the Patois form of "break" and "broken". It also means "broke", as in having no money. The verb form never changes for tense, so "bruk" covers break, broke and broken.
Examples
A im bruk di cup
It was him who broke the cup
Mi bruk
I'm broke (I don't have any money)
How to use it
Neutral and everyday. "Mi bruk" is the standard way to say you have no money.