Just bought my wife a pair of glass shoes
Cause her ass thick as a pumpkin

from Gucci Mane (Ft. Wiz Khalifa) – Nothin On Ya Lyrics on Rap Genius

Meaning

A reference to the fairytale Cinderella, in which the titular character puts on a pair of glass slippers and her fairy godmother turns a pumpkin into a carriage to take her to the ball.

Wiz indeed has a wife with a pumpkin ass:

To help improve the meaning of these lyrics, visit “Nothin On Ya” by Gucci Mane (Ft. Wiz Khalifa) Lyrics and leave a comment on the lyrics box