A top of the range posterior. An ass worthy only of the gods.
1. "Hey man, what you thinking about? Brah I cannot stop thinking about Lidia, she has the phattest batty going"
2. "Word on the street is there's some girl down Croydon way with a phat batty, I'd walk on broken glass for a sneak preview"
3. "Look at the phat batty on that!"