2 definitions by Jayybabyyy

It’s slang for claiming. It’s a New York word. It can also be used in a way as like what you believe or think.
Him: I’m Jackin that he took my headphones
Her: You don’t know for sure so don’t Jack that
by Jayybabyyy February 11, 2020
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It’s an acronym for “Not My Business”. It is easier to type for when you’re in a rush or just if you’re lazy.

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Well there relationship is nmb !
by Jayybabyyy February 4, 2019
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