Top Definition
During anal sex, the man ejacualtes into the anus of the male or female receiver. When the receiver later uses the toilet, what comes out of the anus, a mixture of ejaculate and feces is a poo baby.
Chris and Sean, sitting in a tree,
K-I-S-S-I-N-G,
first comes love, then comes marriage,
then comes the poo baby in the toilet carriage.
by Gabriel Miranda April 12, 2007

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When you eat too much the night/day before - and your bloated stomach's contents have digested enough - and your 'leftovers' are ready to be "dropped off at the pool".
Nat - "I ate too much last night! Poo Baby is ready to launch!"
Kim - "Same here, I'll come with."

Kelly - "I've got a Poo Baby."
by MaceGrey October 17, 2010

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a black child
My wife just had a poo baby! thats how i know it wasn't mine!
by poo_baby_maker5 February 02, 2011

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The offspring that result from a couple having anal sex to avoid pregnancy.
We were doin' it in the butt so she wouldn't get pregnant, but I still ended up paying child support for her poobabies.
by Nikolai Nikolayovich July 02, 2006

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A half humanoid half crap concoction of a thing created by artificialy inserting unspecified things inside of the anus.
"Look! Richard has poo babies!"
by Rafeal January 07, 2007

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When a man has a sex change, to then give birth to a baby that has been artifically inseminated in there anus.
"I heard your pregnant with poo babies"
by Pete Townsand October 06, 2006

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to say someone has excreted or to affend them. If you say sum one is a poobaby it means there mum is a poo or slightly constipated, therefore a mum joke...vo
'you stood on my poobaby'...meanin you stood on my excretion/ chlid
by Joely Smith November 10, 2006

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