They said I was so finished, I told 'em its show business
Meanin there's no business 'less Fiasco's in it

from Lupe Fiasco – The Emperor's Soundtrack Lyrics on Rap Genius

Meaning

It’s just Lupe against the music world here, more specifically his detractors both inside the record label and out. He refuses to back down, though, and staunchly argues that it’s his way with his music, or the highway: “I told ‘em it’s show business / Meanin’ there’s no business, ‘less Fiasco’s in it”

(Notice the pun with Fiasco, since that’s Lupe’s stage name as well as the Latin word for “failure”. So basically, there’d be “no business” if the boy named “Failure” wasn’t there, which is quite ironic on more than one level.)

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