When the youngest child acts as if they are enabled to do daily things such as cook, clean, be alone, etc. Hence acting as if they are a baby. They are dependent on others aide and must be constantly nurtured by others.
Sally asked her older sister, Anna, to make her a snack in hopes she could sit back and relax, but Anna refused claiming she was showing signs of the baby syndrome.
by DoctorSuess December 7, 2014

When an infant is repeatedly kicked untill an unconcious state is reached, then continued untill fatility occurs.
by Dr. TNT March 25, 2012

Baby man that has been cottled by his mama for too long, now he has an unrealistic view of life. Wants to be taken care of by a strong woman because he sits home and plays games all day while his girl goes to work
Ryan has king baby syndrome, he thinks the world is rainbows and fairytales. Someone please tell Ryan to get off his high horse and get a J O B
by Aimee718 December 27, 2024

by Yeet so hard April 16, 2020

When your friend is driving your pregnant wife around, and is such a terrible driver you are worried that your baby might come out pre-shaken, ie sloshen baby syndrome.
by sloshenbaby July 17, 2009

When someone loves something as a baby but neglects or hates it when it's grows up. Most common with people who get puppies or kittens.
by UnseriousCat October 12, 2017

To constantly behave like a baby or young child as an adult. This may include: being spiteful, crying about inane things, wanting attention, self-affirmation, or seen as a constant complainer.
I didn't realize you could get out of an offer to buy a public company for 24 billion, but damn, this dude has terminal baby syndrome.
by Somebody, but not Nobody October 14, 2022
