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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,"
by MGS33 October 20, 2017
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