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1. Buttbaby
A person conceived via anal sex as opposed to vaginal sex that is as a result hideously disfigured to the point of heinousness.
Phil is a buttbaby and he therefore is fucked up looking.
by Tim Nov 3, 2004 add a video
2. ButtBaby
A ButtBabyy is any child that results from semen seeping into the vagina after anal sex. ButtBaby's can be prevented by using a condom, birth control pills, other contraceptives, and by simply not engaging in anal sex.
Father:"Son, now that your 16, its time we tell you that you werent planned, you were a ButtBaby."

Son:"Thats okay, becuase my girlfreind is pregnent with a ButtBaby."
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