Quantum Brain Fart 

When you both remember and cannot remember if you have done something. The state of being unsure if it is a false memory or a factual experience.

Schroedinger to Heisenberg; darn your uncertainty principle, I am having a quantum brain fart trying to remember if I did (or did not) put the cat in the box.

Quantum Brain Fart by Teraknor January 7, 2016

lard brain 

When you eat too much meat at hotpot and the pork fat controls your mind.

Max had lard brain after hotpot, now he's tripping all over the walls.

lard brain by moisttowlettes September 26, 2019

stupid brain syndrome 

Stupid brain syndrome (SBS) is a condition which is caused by plastic particles that are directly inhaled. the particles will then enter your brain and cause SBS

Joey:yo you heard charlie got stupid brain syndrome
Sport: damn shouldve stopped sniffing them blu-ray cartridges

stupid brain syndrome by zxtekiii February 28, 2020

Brain-Weasels

Intrusive thoughts of self-doubt and despair, often associated with depression or anxiety, that crawl into your brain and make it hard to focus on other things.

I was going to go to the party, but my brain-weasels were so bad that I couldn't deal with other people that evening.

Brain-Weasels by e.m.b. December 16, 2015

Reddit Brain 

Neuro-Degenerative disease characterized by 0 IQ opinions formed solely from browsing Reddit.

Meek's opinions are so fucking stupid he must have Reddit Brain.

Reddit Brain by scrotal_recall December 11, 2019

Gizzard-brain 

One who acts as if their brain is an organ full of rocks used to grind up food. JTA

"Don't be a gizzard-brain, think about what you're doing"

Gizzard-brain by Jtallen February 11, 2020

Ciggy Butt Brain 

Ciggy Butt Brain is when you have been abusing the dangerous effects of nicotine for too long and literally have cigarette filters in your head.

Darren "You got ciggy butt brain, that's all that they're gonna call you mate; ciggy butt brain"
Damo "Nuh uh unah nah mate....."
Darren "Cause you fuckin been scoffin away on them ciggies all day. All day all night ciggies."

Ciggy Butt Brain by ashtray111 February 21, 2014