Act like I ain't had a belt in two classes
from Kanye West (Ft. Kid Cudi & Raekwon) – Gorgeous Lyrics on Rap Genius
Meaning
He has mastered the art of rapping and production
One for football, and one for obnoxious commercials

In boxing, one of the marks of a great fighter is becoming a champion (winning the belt) in various weight classes. For example, Manny Pacquiao has won championship belts in eight different weight classes.
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