a elaborate way to tell someone you're going to take a massive shit, the oven being your hot, stinky ass. see also taking the browns to the super bowl, dropping the kids off at the pool
Hours after raping the local chinese buffet, Blake's ass reminded him to take the brownies out of the oven.
A sexual act of deficating into a small ziplock bag, then placing the warm lump on your significant other's face as they sleep, then, when they away, yell "Cut the brownies!" And pop the bag with a pin, causing it to splatter all over his/her face.