They hatin' was the fuel for this shit

from Wiz Khalifa (Ft. Curren$y) – Rooftops Lyrics on Rap Genius

Meaning

Very clever! Fuel and Jet.

Notice how shit makes a homophone with jet, which refers to his clique and trend, Jet Life!

He let’s the haters know that they were the power, motivation and/or supply for him to make it to the top — fuel.

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