rattle the bog

A way to describe taking a shit using an English slang word for toilet. The process of rattling implies a more violent bowel movement such as pebble-dashing or mild diarrhea symptoms, but this term can be used to describe a run-of-the-mill dump just as accurately.

"Oh man, I think I need to rattle the bog!"

"Sorry I'm a few minutes late, I was rattling the bog,"