Slay a Dragon 

The act of release the ultimate black evil from one's anus.

"Dude, I ate way too much food. I gotta go Slay a Dragon."

"Man, I have to Slay a Dragon, that Taco Bell is hitting me the wrong way."

Slay a Dragon by thatguy669606 April 4, 2009

slay a brown dragon 

To take a shit, defecate, poo, empty your bowels.

Can be shortened to 'slay one'

Dude, I need to go slay a brown dragon, I'm about to explode.

Fuck man, I need to slay one.

slay a brown dragon by Skinzzz September 26, 2006