Baboon Breakfast
When someone freezes their poop in a snowbank and shoves it up another person's butt, then the other person shits it back in their mouth. It's called Baboon Breakfast because it's like a frozen poop swap and your ass turns blue.
My sister did Baboon Breakfast with her boyfriend and now they both smell like a dead raccoon.
At school, two kids did Baboon Breakfast and the teacher had to clean the floor.
My dad did Baboon Breakfast with his friend and now they both have a frozen poop hangover.