1 definition by ILoveCheesecake

INCESTion is the act of fucking your wife while she's pregnant and sticking your penus soooo far in that it goes In your babies mouth. Therefore, you are somewhat being an incest.
That incestion last night was sooo good. My baby is gona come out sucking dick like a pro.
by ILoveCheesecake November 4, 2011
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