Top definition
The percentage of stench/stank that fills the air in a confined space (such as a public or private restroom) after releasing feces.
- "damn honey, I'm sorry for taking so long in there."

- "holy crap! I can barely breathe! That must have an SVD of 9!"

-"SVD?"

- " yea... SVD-shit vapor density! You can cut through that with a knife it's so thick!"
by Sneakyneeks August 03, 2013
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