Top Definition
A milky poop sack occurs when a person has consumed a generous amount of dairy; which causes a mucus membrane to surround the excreting feces. As a result of the milky poop sack, skid marks are bound to occur. To rid yourself of such excretions and embarrasing marks, limit your intake of dairy and consume more blueberries. Blueberries have been proven to reduce mucus membrane.
Paul, dont eat that yogurt for it will give you a milky poop sack and stain the bottom of my toilet and/or your underpants. Melissa tell him not to EAT it!!!!!!!
po SaraNicoleG Април 26, 2006

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