A sexual act involving two people (any gender combination works). It begins with one person sticking their butt in something freezing (a snowbank or freezer) while taking a shit. Do not pinch off the shit, but let it hang like a backwards brown cock. Proceed to shove the hardened shit into the other member's asshole. From there the other member re-shits the shit into the original shitters mouth (much like a frozen cum swap).
It is called the Baboon Breakfast because the original shitters asshole should be blue from the freezing cold and because it is a great way to start the day.
Bob: I had a Baboon Breakfast this morning.
Joe: How was it?
Bob: My ass is sore and I'm totally stuffed.
Joe: So it was bad?
Bob: Fuck no. Tasty!