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An action which is done when one needs to go to the bathroom to take a huge shit because of an upset stomach, but then have to throw up at the same time. Because of that, the person has to sit, shit, stand, turn, hurl, and repeat depending on how many cycles it takes not to get any shit/vomit on the floor.
Person 1: Fuck dude, I had that shitty spicy Mexican food yesterday and ended up doing the Bathroom-Boomerang in your bathroom. Sorry about that.

Person 2: Dude that's fucking disgusting.
by Nexyl November 24, 2016
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