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1. A medical term used to describe a child that was conceived by anal sex and/or birthed through the anal cavity.

2. A human so hideous that only an ass could have produced such a thing.
Dora gave birth to a beautiful ass baby boy last night.

Carrot Top is an ass baby.
by JonD January 05, 2006
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2
One who was conceived by their parents anal sex, a small amount of cum drips into their vagina therefore creating the ass baby. This ass baby is inherently terrible at anything and everything that they do.
-Oh wow look at Jebadiah he sucks at life.

-Yeah i know he is a total Ass Baby.
by Hauss Piece July 19, 2011
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5
When a couple is having anal sex, and sperm drips from the anal cavity to the vagina, impregnating the woman.
The ejaculate from John's then empty testicles dripped from Denise's anal cavity to her vaginal mound, thus impregnating her. She then gave birth to her beautiful ass baby, Clifton.
by willdbeast April 20, 2006
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6
When a gay man fucks his best girl-friend so hard up the ass that is creats a small hole through which an egg can travel from the ovary to the rectum. Then when he ejaculates into her ass she becomes pregnant and nine months later a baby explodes out of her ass. It's an Ass-Baby
"Lindsey, your butt has gotten really big"
"yeah, it's russles Ass-Baby, it's gonna explode out any day now!"

Your Ass-baby is covered in shit!
by professor Quinta August 17, 2006
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7
A baby that was conceived in the ass hole. Usually by instruments of a strap-on, and most exclusively conceived by males.
That Ashe chick got me preggers... It's an assbaby...
by Ashegirl July 11, 2009
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