Musty Basement 

A mungy, sweaty, dirty ass and bunghole.

Baby go wash dat ass. You gots a musty basement. Stank ass bitch.

Musty Basement by Eaton Holgoode April 23, 2015

Musty Basement 

Slang for a woman’s vagina.

I’m not getting anywhere near her musty basement.

Musty Basement by MLWriter May 2, 2019

Cleaning the Musty Basement 

To wipe and wash up one's Musty Basement aka dirty ass. May also apply to one's arse that has been given a cream pie.

After tapping his foot in the stall, Larry was joined by a brawny mate who pumped his arse full and left Larry Cleaning the Musty Basement when they were finished.

Cleaning the Musty Basement by Eaton Holgoode April 24, 2015