to release an oily water-like substance out of the anus, after consuming low to non-fat foods, such as WOW chips.
"I have to go clean the oily discharge out of my underpants."
by chipper December 22, 2003
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Check out the side effects for a medication. If it states "Oily Discharge" as a high possibility then put it down. Walking around Wal*mart all day with mud butt is not worth getting rid of whatever the hell is wrong with you.
::drip:: what the hell was that?, Ah crap! mud butt!
by iwannabeanalcoholic March 26, 2005
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