The aftermath of a furious session of butt sex, butt babies are the resultant mix of shit and cum that is ejected from the recipient's asshole at their next dump.
After taking dick in the ass, Mattia delivered a healthy 1lb. butt baby the next time he went to the restroom.
A child that is concieved by anal sex.
Gestation occurs in the lower intestine and the baby is born through the anal sphincter which dilates (to up to a foot) in diameter for this purpose.
I always thought anal sex was the most reliable form of contraception until i got pregnant with a butt baby and contracted herpes.
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.
While performing sloppy anal sex with little to no care; if semen is allowed to drip from the anus into the vagina what we now know as a butt baby has the potential of being conceived. Butt babies are quite obviously identified as their overwhelming need to whine about everything and their pungent odor that will never fade.
UPDATE: Warning! It has been confirmed that a dirty toilet seat can also result in becoming pregnant with a butt baby!
Daryl: I hate that douche Scott. I can't believe he has a job here, I don't even think he is capable of dressing himself.
Bill: Dude... Scott is a butt baby, stop being so judgmental and put yourself in his poopy shoes for a hot minute.
Daryl: Oh man, I had no idea... now I feel like a butt baby.
1)A baby which has been either concieved due to anal sex or has been born through the anal passage as opposed to the vagina. Usually resembles a faeces covered fetus.
2)An insult directed at people who enjoy rectums and their function.
1)"Thomas was a Butt Baby, he was born out of a smelly anus."
2)"Thomas is such a Butt Baby, look at the way he acts around rectums."