They call me Fire Marshall: I shut the shit down

from Eminem – Seduction Lyrics on Rap Genius

Meaning

Eminem’s real name is Marshall (and he’s “on fire”)

To “shut shit down” means to dominate (unless the fireman is doing it…then it means you have overcapacity)

Possibly another poke at Lil Wayne — the ‘Fire Man’. Em is saying if Lil Wayne is the fireman, that must make him the Fire Marshall.

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