When someone totally pigs out on something all at once. You start to call them a pig, but then you cross it with a cow. The pig out feast may be accompanied with snorting.
"OMG Aimee, I can't believe you just ate 9 1/2 tacos! You're a piggy moo moo."
by Superood May 14, 2010
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Stated to a coworker grabbing your chocolate milk out of the company's fridge:
GET YOUR HANDS OFF MY MOO MOO JUICE!!!!
by buckeyeoh January 10, 2019
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A type of hentai involving breastmilk squirting from a female's breasts.
Bob: DAMN, I love moo-moo hentai girls. They're so hot!
by oxy September 19, 2006
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A woman with insanely large nipples. Resembles a real cow's nipples in size, or simlar size to a very fat index finger.
Nothing gave me more pleasure than sitting on Aunt Jizzy's lap and suckling on her big old Moo Moo Nipps.
by The Dirty Pajerty March 25, 2011
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