Moon Ass 

A woman's gluteus maximus that is mainly constructed of cellulite. Due to the lack of muscle the ass is covered in dimples, loose spots, and has an appearance that resembles the moon: a cratered surface.

"Yo I heard you got with Sarah, how was that fat ass of hers?"
"Shit was nasty dude! Bitch's ass was filled with dimples and it was loose as fuck!"
"Damn, really! I never thought Sarah would have moon ass!"

Moon Ass by Spenceykins January 19, 2014

Born with his ass facing to the moon

It's a Brazilian expression used to describe a person who is very lucky in life.

In a period in time where a caesarean delivery was not a commont practice, a baby who was born legs first (beeing pulled by it's legs first and not by it's head) usually would not survive the operation, so any baby who was born legs first (with his ass facing to the moon) and survived was considered lucky

I can't believe he won that car, he was definitely born with his ass facing to the moon

Born with his ass facing to the moon by Luska75 October 6, 2022