1 definition by Da Beast from the Middle East
When a person is sick and when they go to use the bathroom to take a dump, a sudden urge of vomiting arise and with no to wipe, flush, and pull your pants up, they get on their knees and vomit with their naked butt up in the air.
My mom caught me in the bathroom with butt-up syndrome. She asked me "Saba why do you have your pants down when you are vomiting" I replied, "Because I didn't have time to wipe and pull them up!"
by Da Beast from the Middle East May 1, 2009