Definitions by Damien AKA "Uncle Ruckus"

Crater Ass 

When one's ass appears to be inverse from typical proportions
It appears to be completely flat or even inverted compared to a typical rounded and/or rotund ass
Shaped perfectly for sitting atop a giant ball

"That guy has no ass, like - It's MISSING! What a Crater Ass!"

Crater Ass by Damien AKA "Uncle Ruckus" September 10, 2020