Synaptic transmission no longer functioning in ones brain due to intense stupidity, said to be contagious and communicable. Once caught, a person retains their previous knowledge, however is unable to acquire anything further.
i’ve heard Luke caught the brain purge off Liv, it wouldn’t of happened if she’d stayed in quarantine!
by bobbyscult April 22, 2019
The loss of brain cells due to the excessive use of marijuana, resulting in getting stuck on a word or thought
by Janet flight August 31, 2017
by El clappo May 12, 2020
by Gwilz November 06, 2018
by Lumpy T October 23, 2017
To infer that someone's cognitive function is on the lower end of the spectrum by alluding to "Sped". Sonic is widely regarded as a very speedy character and sonic is an attempt to play on the word sped. Attaching Sonic to the brain means sped brain for lack of a better phrase.
*Plays game*
John: "Kill him, he is one shot."
Bob: *Misses every shot*
John: Do you have sonic brain?
John: "Kill him, he is one shot."
Bob: *Misses every shot*
John: Do you have sonic brain?
by Pogopawee March 19, 2021
Doing a lot of things that require your brain.
Tomorrow has to be all business. 10am office hours for chemistry, then study 3 chapters of psychology. I’m going to be so brained out.
by dramastace May 03, 2016