When one dresses and acts like a baby, Having to be cared for in every way by a mommy, daddy, or both.
Adult Baby Joe has a mommy that feeds him and changes his soiled nappies
by Leshrec November 1, 2006
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Also referred to as AB
A person who acts like an infant or baby. Normally dresses up in a variety of baby like clothing like diapers, onesies, bibs, sleepers, and kid like shirts. Some adult babies find comfort and security in diapers and being cared by a mother or father. The age range for adult babies can vary from newborns to toddlers. Adult babies do not find sexual arousal out of diapers unlike diaper lovers (DL)
That Adult Baby isn't exactly the most normal. All he does is sit their like a read baby and have his mothers change him.
by Broken-Steel-Rocks June 30, 2009
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An Adult that acts like a baby e.g getting their nappy changed by someone else.
"Have you seen that adult baby next door? He's so weird!"
by Fernus123 August 31, 2015
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Human adult babies are similar to regular adults except they are more immature, and underdeveloped. Adult babies may have the physical appearance of a regular adult, but internally they have the developmental maturity of a newborn or infant. There are currently 1.5 million human adult babies in the United States and that number is growing daily. Adult babies have been largely discriminated against in the US. One of the most offensive things you can say to an adult baby is “Grow Up!” or “Goo-Goo-Ga-Ga” One of the best organizations to support human adult babies is the Human Adult Babies Of American Foundation also known as HABOAF.
by MaxStiffman69 June 17, 2022
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An 18-20 year old human.
Mom: "Happy Birthday, son! You're 18 years old today, wow!"
Son: "Thanks, Mom. Yup, I'm an ADULT now! Legally I can do whatever I want and you can't ground me."
Mom: laughs "Adult? You're a BABY adult."
by Princess Butterfly June 26, 2017
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