brownie drop off: to have a bowel movement; a relief like dropping off your daughters for meeting of the Brownies.
Feeling so good; I had a brownie drop off. It's a load off my mind.
*knock on the bathroom door*
I'll be a while, I have to drop a brownie!
When a person drops numerous pellets of shit.
"Holy Shit! When Dan did his new gymnastics move, he had everyone in the room dropping brownies!"