A badass vape trick wherein one person blows an O into another person's ass and the second person farts the O back at the first person so the first person can ghost inhale the "Brown Cloud"
Hassan let out an Asian Brown Cloud so dense and caustic at Ghengis Kahn that the police had to evacuate the entire block, and the restaurant repainted the interior before reopening.
When a turd is flushed, but does not go down and ends up sitting in the toilet water. When it sits for many hours degrading, when the toilet flushes a again and disrupts the environment and creates a "cloud of brown" in the toilet water.
Oh boy, I just found the deuce you dropped a few hours ago still bobbing in the toilet! Oh boy did I shake up a cloud of brown in the toilet water when I flushed it down. Here's a saying. "When you happen upon a turn in the toilet bowl, flush it down, just be prepared to create a cloud of brown"