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A Caribbean word for a nosy freak who can't keep their mouth shut about stuff that isn't any of their business. They like to eavesdrop and gossip like they're paid to.
My neighbor is a macco. He told my mom I was fat before I even said anything.
I saw a macco whispering to my teacher about my math test. I got a D because of him.
That macco followed me to the store just to tell the cashier my secrets.