Thick, nutritive poop
From KGB Wiki
Thick, nutritive poop is an obsession of individuals KGB disavows knowledge of, brought into the collective consciousness with the establishment of the Committee to postulate what the world would be like if instead of air we had thick, nutritive poop
It also makes a great non-sequitur punchline for nearly every joke. Observe:
Q: Why didn't the skeleton cross the road?
A: Thick, nutritive poop.
We promise that this won't annoy your friends after the eightieth time.