I was taught to act my shoe size, never my age

from Tyler The Creator (Ft. Domo Genesis) – Pigs Fly Lyrics on Rap Genius

Meaning

A reversal of the common adage, ‘act your age, not your shoe size’. This line may also be hinting that his maturation was impeded during childhood.

To help improve the meaning of these lyrics, visit “Pigs Fly” by Tyler The Creator (Ft. Domo Genesis) Lyrics and leave a comment on the lyrics box