A child born as the result of butt sex.
My boyfriend and I were doing it the "Greek Way" when I noticed something fall out of my vag. A butt baby!
by Deadbehbeh December 27, 2008
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A butt baby is a person that looks like the combination of two male celebrities or men you know
That guy looks like Leonard Nemoy and William Shatner had an illegitimate butt baby
by Mooseburgers June 10, 2018
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When a guy comes up behind a girl and grinds them. Most often, the action is unsolicited.
At the club last night, I had to stay close to my friends because so many guys were trying to make butt babies with me.

I don't wanna make a butt baby with you!
by tinybubbles95065 June 18, 2010
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A baby that smells like butt
Sam: Yo man did you hear Terry just had a real butt baby.
Jake: Yeah man that baby stinks.
Sam: They should really watch it.
by Aruuuu May 16, 2016
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This refers to a broad category of mentally or physically deformed individuals. Unfortunately for these people, they were conceived after semen seeped from their respective mother's anuses into their vaginas after anal sex. This mixture of fecal matter and sperm, that fertilized their mother's eggs, often produced ghoulish offspring that are genetically predisposed to being very unattractive or educationally inept.
One could say that they passed a short bus full of butt-babies on their home from work or that they saw the maturing process of a butt-baby by watching "Texas Chainsaw Massacre: The Beginning".
by C-Murdah April 5, 2007
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Butt Babies is a term used mainly by homosexual men to tell another man that they would like them to ejaculate in their butt.
Durk: I want you to fuck my ass.
Lewis: I want you cum in your ass!
Durk: Lets make Butt Babies together!!!
by Buttsauce January 28, 2008
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A fictional baby conceived by anal intercourse and birthed through the anus, just as a regular baby is conceived by sexual intercourse and birthed through the vagina.

In reality it is impossible to impregnate anyone or give birth through the anus. Mentioning or discussing the concept of a butt baby is a pursuit into often intentionally juvenile humour.
John: "Shut up, you butt baby!"

Rick: "Hey, us butt babies are contributing members of society! We are all equal, whether born from the hoo-ha or born from the ha-hoo."
by DanielCornelius September 7, 2012
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