Got some new bills in the mail,
Instead of talking about the bills he has to pay that usually come in the mail, he is talking about the bills he is making (dollar bills). With the money he gets, he is going to pay off the people that have helped him become so successful
He could also be referring to his relationship with strippers and that he is paying their bills, paying off favors that they do for him. This theme comes up in a lot of his other songs.
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