Marijuana grown in one's house as a means of paying rent, utilities and other bills.
Ian: Hey Randy, you do you afford rent when you don't have a job?
Randy: Easy man, converted my spare bedroom into a grow room. The Silent Roommate pays for it all...
A fart that comes out of your ass that you didn't mean to intentionally let that is extremely quiet. "Like slippers on a floor".
I was in a meeting at work when I suddenly felt a grumble in my stomach, I couldn't up and leave at that momemt; however, some silent slippers popped out of me like a squeezed balloon.