Rat Brains 

When a man squeezes his balls so that the scrotum bunches up slightly and takes on the appearance, shape, and texture of brains.

Carl pulled his balls out and showed everyone his rat brains.

Rat Brains by Crabkilla2001 January 16, 2009

TikTok Rat Brain

The deterioration or smoothing of one's brain due to excessive consumption of TikTok or other short-form media can lead to various symptoms. These include a shortened attention span, an inability to form complete thoughts, profound boredom when not mindlessly watching TikToks, and frequent references to "Skibidi Toilet".

"I need to stop watching TikTok, man. It's making it hard to focus."
"Yeah, man, I got that TikTok rat brain."

TikTok Rat Brain by OnJod October 8, 2023

Rat Brain

When a dude stretches his scrotum tightly to one testicle and displays it. He could put it right next to a sleeping person's face, for instance. You could also just tightly wrap it to two testicles.

Dude, get your rat brain out of my face.

Rat Brain by Joe W. October 10, 2004

rat brained 

when you get super drunk off your ass

”I got so rat brained last night that i peed the bed”

rat brained by ratbrainedhoss March 2, 2023

ratbrain

When wearing shorts you pull out one nut to show a suprised victim, thus ratbrain.

"Hey man wanna see a ratbrain?"
"Huh, a what...oh ewwww!!!"

ratbrain by the killa October 25, 2003