brain baby

An epiphany of thought. When someone suddenly has a brilliant idea.

omg, i just birthed a brain baby.

by Volcanis August 22, 2011

baby bitch brain

person with small brain

"you have baby bitch brain"

by babybech April 12, 2019

Brain baby

When someone is a stupid fucking retard

Hey, see Ava over there? She's a fucking brain baby

by Hamborgler November 29, 2018

Brain Baby

Anything with an overly large head, or anything that looks top-heavy in any way.

Man, did you see that psychobilly, brain baby thing over there? it's head was all greasy and stymie like rubber johnny's.

by Angus_for_president December 27, 2007

brain baby

The result of when a man jizzes in a girl's ear

My girlfriend didn't want me to cum in her mouth, so I came in her ear. In 9 months, she'll be having a brain baby.

by wotcher now October 21, 2010

baby brain

As a noun, a type of brain that acts like a baby, either because its a baby or because it is teenager or adult but easily distracted, impulsive or rapidly changeable in mood.

As an adjective (baby-brained), a immature person with a baby brain.

The president's baby brain embarrassed the country once again by confusing three unrelated policy notions during his press conference with the visiting prime minister.

by davelat September 3, 2025