Top Definition
When you ass rumples, you know you have to poop.

Like you stomach grumbling, but it's your ass.

The overwhelming feeling that you have to poop, but the absolute inability to do so and the sounds that accompany it.
- "Dude, did you just fart"
- "No I have a wicked case of the bumblies"
by Drcolonbumbles November 08, 2011

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