I be rapping and tongues packing
The ones, magnums, cannons and Gatling guns

from Big Punisher – The Dream Shatterer Lyrics on Rap Genius

Meaning

Big Pun’s raps are so dangerous, it’s like his tongue carries an arsenal of guns

Rapping “in tongues” could refer to speaking in tongues, a religious practice pertaining to random syllabic sounds which may or may not be the holy language (also known as glossolalia)

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