That's why I walk with a limp, motherfucker
I'm a pimp, motherfucker

from J.R. Writer (Ft. Cassidy) – GOAT Lyrics on Rap Genius

Meaning

He walks with a limp because his member is so big. This makes him do the “pimp stroll” — i.e. walking with a limp in the manner of a stereotypical pimp

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