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Mother Brain 

The large biomechanical brain from the metroid games. It was featured as a boss in 3 of the games. The mother brain is a giant brain in a glass case that acted as a giant computer for the space pirate forces. It bears one large eye capable of launching energy attacks and has indestructable gun turrets protecting it. The mother brain gets its energy from long columns of nerves in her chamber called zebetites. In Metroid for NES, Samus had to destroy zebetite barriers to get to the mother brain. In super metroid for the SNES, The mother brain had a huge bio-mechanical body built for the sole perpous of killing samus. In this form it had a hyper eye beam, and was able to spew projectiles at samus.
The mother braind is a bitch to kill!
Mother Brain by Jim October 2, 2005

Mother Brain 

1. Enemy of Samus Aran in the Metroid games "Metroid" and "Super Metroid," Mother Brain is the presumed leader of the Space Pirates and, together with her winged colleague, Ridley, poses a great threat to the Galactic Federation. Armed with her vast intelligence, she seeks to manipulate the power of the Metroids to her advantage.

Typically depicted as resting immobile in an armored case, Mother Brain has also developed other means of defending herself. In "Super Metroid" she demonstrated her combat ability through an enormous bio-mechanical bipedal body- the use of which granted her the mobility she needed to bring her energy beams and bombs to bear against Samus.

Mother Brain was responsible for the slaughter of the "daughter Metroid" of Samus Aran at that same confrontation, adding to the acridness in the feud between the two.

2. an intelligent, reclusive person who remains somewhat guarded and isolated; tends to shy away from those less intelligent than them
1. The Mother Brain killed my babyyy!!!

2.

-Where is Margie?

-She's at the library again. In the basement.

-She's such a Mother Brain!

moth brain 

Someone who enjoys fireworks. Like moths, these people are easily distracted by lights and oblivious to the downsides of fireworks, like the pollution of streets and the air, its negative effects on wildlife as well as pets and the trigger potential for people with PTSD, namely veterans.
A: But it's so pretty, don't you enjoy the lights??
B: What a moth brain...

Mouth for brains 

A word used to describe a person who has no brain. Where their brain should be there is only another mouth that never shuts up. Interchangeable with loud mouth, big mouth, motor mouth etc
Hey, mouth for brains, STFU!

Brainmouth 

A condition found in animals from the planet earth(primarily humans)in which the animal loses the ability to NOT speak every single word they are thinking. The verbal words are spoken about 1/trillionth of a second (actually faster than the speed of light) after the thought of the words in the brain itself.
Dad walking down street with 3 year old daughter bump into an extremely overweight acquaintance of dad's.

Dad:"Hi Lyndon."
Lyndon: "Hi Chuck."
Gracie(3-year-old daughter poking finger into Lyndon's large soft belly):"Mr. YOU have a FAT tummy!"

Gracie would at least momentarily be experiencing "Brainmouth".


Brainmouth by Squarezup November 3, 2008

Stealthie 

when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.

This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"

FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"
Stealthie by gwenhyfar October 2, 2016
Word of the Day on May 25, 2026