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The scientific term of a fetus growing in your anus. also a thrash band from hull.
"Damn! i shunt of got bummed! i've got introrectalgestation!"

"Hey Mungrl you coming to see introrectalgestation at ringside tonight?"

"mum, what do u call it when a babys growing in your ass?"
"introrectalgestation son."
by mungrl January 22, 2008
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