Top Definition
a far more liquid case of mud butt where one's shit seems more like piss coming out of your ass.
Oh, shit! Stop the car! I've got flood butt like a mother fucker!!
by Mikel B July 11, 2006
Similar to its cousin, the mudbutt, only it comes in violent waves, much like a flood, often resulting in death.
I had such bad floodbutt last night my toilet exploded
by buddykrist November 05, 2010
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