Meaning
To work hard and resourcefully to earn a living, by any honest means available — street vending, small trading, odd jobs, or side gigs. A 'hustler' survives by their own grind. In Jamaica hustling is usually respectable, even admirable, self-reliance, not necessarily anything shady.
Examples
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Mi haffi hustle fi mek ends meet.
I have to hustle to make ends meet.
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She hustle a market fi feed har pickney.
She hustles at the market to feed her children.
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Every day a di same hustle.
Every day it's the same grind.
Origin
From English 'hustle' (to work energetically); in Jamaican use it centres on honest self-reliant earning, the informal economy.
How it’s used
Usually respectable self-reliant earning, not necessarily illicit. Compare 'eat a food', 'juggling'.