What is Cosmic Brownie?
1.
When colored marbles are shoved up your lovers butthole and then propmtly shit out resembling the Little Debbie snacks we love so much.
While having extramarital sex, I shoved marbles up by girlfriends ass and she shit on me, giving me a cosmic brownie.
See
2.
after sticking it in someone's ass, you blow a load and make them lick off the cum and poop mixture.
my girlfriend said she was hungry, so i gave her a cosmic brownie. she loves that kind of shit.