What is Burnin?
1.
to have a STD
She burnin, don't fuck her
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2.
To smoke weed. As in Mary Jane, as in trees, as in grass, as in green.
From Sean Paul's "We Be Burnin":
Everyday, we be burnin not concernin what nobody wanna say
We be earnin dollars turning cau we mind deh pon we pay
some got gold and oil and diamonds all we got is mary j
legalize it, time to recgonize it
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3.
A fratty southerner's way of asking if someone is "burning down the house," meaning "are you drinking a lot these days?"
"Burnin?"
"Naw, not as much these days, brah."