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An allusion to taking a very dense and husky poo, often shortened to simply "MBGB".

"Milky Bones" is in reference to the robust brown consistency and texture of poos that resemble the popular canine treat.

"Grumble Bee" is a jovial and light hearted metaphorical reference to the sound of an angry bee, not unlike the sound one's bunghole may emit during an "MBGB".
"My grandpa always said: KFC today, milky bones grumble bee tomorrow."
by NorthernTurdlinger November 25, 2011
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