But if a man test my Stuy
I promise he won't like my reply
Boom bye bye

from Jay-Z – Brooklyn (Go Hard) Lyrics on Rap Genius

Meaning

If a man questions my BK credentials (Bed-Stuy), he’s a goner

Also, if a man tests my “sty” as short for “style.” I.E. calls me out for anything

“Sty” could also be short for pigsty, which could be interpreted as a relatively dirty place (which would make sense because he’s talking about how rough Brooklyn is) or as a shelter where pigs are kept (which would simply be stating that Brooklyn is his home like a pigsty might be a pig’s home).

“Boom bye bye” is a Buju song about killing homosexuals (with lyrics such as “Boom bye bye Inna batty bwoy head” where “Batty boy” is a derogatory term for homosexual)

Hov has been talking about looking him in the eye in the previous lines saying thats not a problem but if you test his neighbourhood it will be.

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