I be wildin' like Capital One
What is in your wallet

from Lil Wayne (Ft. Fabolous & Juelz Santana) – You Ain't Got Nuthin' Lyrics on Rap Genius

Meaning

If you don’t pay Wayne the money you owe him, he’ll have to come to you and beat you up for it, referencing this corporate slogan

I actually think he’s saying here that you better keep paying him (aka buying his records) or he’ll revert back to his street ways and start robbing people again, hence “what is in your wallet?!” Also, he’s playing on the Capital One Credit Card slogan. In Capital One’s advertisements, a gang of vikings would wile out on people

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