Motherbrain 

1. Enemy of Samus Aran in the Metroid games "Metroid" and "Super Metroid," Motherbrain 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, Motherbrain 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.

Motherbrain 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 guards themselves (sometimes literally) against others.

1. The Motherbrain killed my babyyy!!!

2.
-Where is Margie?
-She's at the library again. In the basement.
-She's such a Motherbrain!

Motherbrain by Metroid lover March 7, 2008

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

Motherbirding

To take a shot of liquor and pass it around mouth to mouth. Similar to shotgunning weed. Preferably done with cuties.

She and I were totes motherbirding Jameson to Samo, and then A-trak was like, "only if Samo passes it to me."

Motherbirding by ghostofmakeoutpast May 17, 2011

Motherain 

A cute and hot steam player who never talks in VC and is a Dino Geek😍

Dang Motherain have been a total ass today

Motherain by Sussybaka382828 June 16, 2022

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!

Mother Brain by Mama Brain's boy May 30, 2011

motherboating 

Sexual act with instructions as follows:
1. Place face between lactating breasts
2. Shake face briskly back and forth
3. Make outboard motor sound effects
Extra points are awarded for milk spray...

Sally may not have lost that baby weight yet, but those titties are prime for some motherboating.

motherboating by Dan92672 June 18, 2011

Motherbirding

When a girl is finished giving oral sex, and the man ejaculates into her mouth, she spits it back into his mouth, much like a mother bird spits up worms into its babies mouth to feed them.
Somewhat like snowballing.

David likes it when I start motherbirding in his mouth. Davey like it.

Motherbirding by youadirtygirl November 30, 2011