Definitions by CGCS!

Butt Musk 

The aroma emitted from your anal cavity when you've had one too many bean burritos from Taco Bell.

Mang, I shouldn't had that chimichanga--I've gotta let loose some wicked butt musk!

What is that? Did someone drop a deuce?
Nah, I think she just let some butt musk slip out.

Butt Musk by CGCS! October 21, 2008