Bowel Out
To skip or pass up something because you need to take a dump.
Man 1: You want to join me and a friend for a game of pool?
Man 2: You two go ahead. I had Chipotle for dinner so I've got to Bowel Out this game. Hopefully I can play the next one.
Man 2: You two go ahead. I had Chipotle for dinner so I've got to Bowel Out this game. Hopefully I can play the next one.