Top Definition
A thick fart that slides up your crack 1 inch and then seeps into your pants. the stink marinates for 20 seconds before forming a cloud of death similar to a nuclear bomb coming from the anal region. It lingers, for far too long.
Did you see that Obulum Cloud come out of Martin's bumholio?
Yeah Kimberly sucked it up and got high off of that obulum cloud, that thing was like vaporized ass shrooms
by Janie Vaginey January 24, 2011

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