Dirt Basement

1.The butt ; i.e., the anus , or anal canal

Deriving from:

2. An unfinished basement ; specifically one with a dirt floor

Example: ¹
*Someone puts their hand dangerously close to my ass crack *

"No key, no entry to my dirt basement"

Example: ²
"I only go in my dirt basement for laundry. It's too dampand smelly to be in it all the time."