Your brain doesn't work right and the gears don't function right. Otherwise said as you are stupid, dumb, an idiot.
by Smooth brained mf October 3, 2019

smooth brain- it is someone that is an idiot. this means that the more ripples you have on your brain, the smarter you are. So in conclusion, if you got a smooth brain then you are a dumb ass.
1.Jim sucks at chess he is such a smooth brain
2. Jim: HOWDY Y'ALL! Darry: pfft smooth brain Bryson: what a dumbass
2. Jim: HOWDY Y'ALL! Darry: pfft smooth brain Bryson: what a dumbass
by yomama.coma December 4, 2020

In recent studies on the media dominating instant messaging platforms like Instagram, I have came to the conclusion that the media can have a negative effect on youth. The media is feeding these youth groups information that results in degrading of the brain. I dub this effect the “smooth brain” effect.
by Dr. Wombology March 19, 2022

Smooth brain:
my brain: smooth, no weinkls, cute, cant think=no sad
Wrinkle brain:
yuor brain: BUMPY WEIRD, GROSS WRINKLES, UGLY!!!!!!!!, THINKS! = SAD!!
my brain: smooth, no weinkls, cute, cant think=no sad
Wrinkle brain:
yuor brain: BUMPY WEIRD, GROSS WRINKLES, UGLY!!!!!!!!, THINKS! = SAD!!
by funky homesickle November 28, 2020

Some random person that they decided to just smooth out their brain in exchange for actual intelligence.
by YoursTrulyTheJoking November 18, 2020

by Brain Pretzel September 17, 2020
