What is Shit Baby?
1.
During anal intercourse, the thin tissue separating the anus and vagina breaks and semen fertilizes the female's egg resulting in a shit baby.
Dave: Why is half of John's face a birthmark?
Mark: Because his mom is a whore and John is a shit baby.
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2.
A baby that is born alive despite no symptoms of pregnancy and/or survived abortion attempts while in the womb.
Jen: Either my stomach is seriously acting up or I am about to have a shit baby.
Chad: That's gross.
Jen: Seriously, it's going to be the size of a child. I have to go.
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