I'm flying on a beaver, you're a disbeliever
So don't ask for no mothafucking ride when you see us

from Tyler The Creator (Ft. BranDun DeShay, Hodgy Beats & Mike G) – Session Lyrics 5 on Rap Genius

By “flying on a beaver”, Tyler means “doing the impossible” (cf. “Pigs Fly”). He tells all the people who don’t believe in him achieving his impossible dreams that they shouldn’t jump on the bandwagon when he achieves them

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