Meaning
A person who has risen to money or status suddenly but lacks the manners or grace to match it — an upstart with new wealth and no class. Said with clear disapproval, 'hurry-come-up' mocks the flashiness and pretension of the newly-risen, the one who came up in a hurry and shows it in vulgar display rather than quiet breeding. It belongs to the Jamaican vocabulary of class and manners, scorning the parvenu who has the money but not the 'broughtupsy', all show and no true standing.
Examples
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Him a pure hurry-come-up, nuff money but no class.
He's a total upstart, plenty of money but no class.
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Di hurry-come-up dem love show off.
The nouveau-riche love to show off.
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Old money quiet; hurry-come-up loud.
Old money is quiet; the newly-rich are loud.
Origin
A descriptive compound — one who has 'hurried' to 'come up' in the world, rising too fast to gain any polish.
How it’s used
Always disapproving, criticising showy new wealth without breeding. Close to calling someone a flashy upstart.