When you blow a hemorrhoid during a massive, rough shit leaving a reddish, rusty colored stool. Very common at rest areas and truck stops from the long haulers stopping in to grunt it out.
I was droppin’ a rusty at the rest stop today before I got back on the road.

Someone was in there droppin’ a rusty. It sounded painful. All I heard was straining and the words “Damn Roid” then a very wet splash.
by Eaton Holgoode April 27, 2018
Get the Droppin’ a Rusty mug.