Rock brain

When you brain is as useful as a rock.

Man, after hitting that blunt I got mad rock brain.

Rock brain by Gwilz November 5, 2018

brain rock 

When you think of something bad that happen to somebody and, it really happens to that person.

I through a brain rock at that guy, hoping he would fall, and... well he fell!

brain rock by Zabimaru555 December 15, 2008

rackbrain 

When someone's so fucking stupid and annoying but ceases to believe or see how absolutely fucking retarded and annoying they are

Guy 1: Holy shit Vitos so fucking stupid it hurts.
Guy 2: Yeah I know he's so annoying, fucking rackbrain.

rackbrain by Derphole50 September 11, 2020

rockbrain 

Offensive slur for Tennessean. Particularly of the stereotypical, hick nature, but not necessarily. From the phrase "Rocky Top" that refers to the geological characteristic of Tennessee, but it actually refers to the fact that Tennesseans have rocks for brains.

Fucking rockbrains can't stop leaving their keys and loaded guns in their running cars.

Chattanooga is nice, but it's full of rockbrains.

rockbrain by GoVolsTN September 30, 2020