I walk light so I don't piss the ground off

Meaning

Wayne doesn’t make any heavy steps to avoid stressing the ground

WEEZY: Earth isn’t worried about a guy called “LITTLE Wayne” taking heavy steps; it’s that Fat rapper called “Joe” who needs to step lightly…

Little Known Fact: Wayne weighs 155 pounds, and his hair accounts for roughly 40% of that weight.

Could also mean that Lil wayne is high.

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