Brain Boner

When you are talking and then have a random smart moment.

"Your mom just had a brain boner about robotics"

by Expression of happiness July 22, 2014

Hare Brained

A person having the intelligence of a rabbit.

An idea or philosophy that a rabbit could have conjured up

George W. Bush was the most hare brained President we ever had

Who ever came up with the hare brained idea of a burial vault?

by Stefonamus April 2, 2010

Lame brained

Foggy headed.
Inability to think.
Brain dead.
Out of sorts.
Stooper.
Without thought.

"I don't know bro. Give me a minute to think about it. I woke up lame brained. I had a long night ."

"What's taking you soo to answer my question? It's not Chinese arithmetic. You need to lay off the spice man. That shit has you lame brained."

by Lauleneke Lukini Brown March 17, 2022

brained out

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 21, 2016

dunder brain

A better, more correct version of 'dunda head.' Dunder brain can be used as a friendly insult, but do not try actually paying somebody out with this word, because you will seem like a complete moron, and a 'dunder brain' yourself.

Can refer to someone who is muddled in the brain, or a generally silly person.

Kayla: "You're a dunda head"
Me: "No, Kayla, it's dunder brain"
Kayla: "You're a retard"

by bucranogus September 16, 2010

Sonic brain

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?

by Pogopawee March 19, 2021

Brain Case

noun. the human skull or head

Cory slipped and broke open his brain case all over my kitchen.

by Big Poppa Frost October 11, 2007