insane in the membrane 

Something that is beyond normal amount of crazy; from the Cypress Hill song "Insane in the Brain"

Man 1: I'm getting my spine pierced later.
Man 2: That's insane in the membrane!

insane in the membrane by thegestalt September 19, 2005

Professor Membrane 

Professor Membrane is an awesome scientist in the best show ever to come out of Nickelodeon, "Invader Zim". He is the father of Dib (Zim's arch-nemesis) and Gaz. Unfortunately since evil Nickelodeon cancelled the show we will never find out more about this eccentric randomly yelling scientist guy. Professor Membrane is also know for the creation of "Super toast" which sounds pretty awesome to me.

"Not now son, I'm making TOAST!" -Professor Membrane (exclaiming to Dib)

Professor Membrane by invader_adie October 22, 2009

dildation membrane 

A person that has no regard how cheap they look to another person and wear the name like a badge. a.k.a. Just being an asshole in general. Being a dildo skin.

The guy almost knocked me over in the coffee line so he could pick up a penny. What a dildation membrane.

dildation membrane by booger wall June 15, 2011

insane in the membrane 

defines something beyond crazy

"dude, thats insane in the membrane"

insane in the membrane by Allison September 23, 2004

Dib Membrane 

A precious boio who needs to catch Zim. Also the son of Professor Membrane and brother of Gaz Membrane.

Me: Dib Membrane is my favorite Invader Zim Character and I love his hair.
Zim Stan: Eww.

Dib Membrane by 420Cheesecake October 29, 2020

selectively permeable membrane 

A hot girl's vagina.
Very selective on who's dick is permitted through the membrane (her pussy lips.)
Will often deny nervous, non-jock types. The membrane judges largely on physical appearance, not on the pretense of a good personality or wit.

Guy 1- So did you sleep with Elena in the end?
Guy 2- No, she had a selectively permeable membrane.
Guy 1- ... So she turned you down?
Guy 2- Yeah.
Guy 1- Well just say that then!
Guy 2- I needed to make an example for a definition for urban dictionary, okay?!
Guy 1- Oh, right... Wait a minute, am I on TV?!

selectively permeable membrane by uwanttruthitellz May 9, 2009

insane in the membrane 

Smoking some of that good chronic and it's hitting you hard making you; insane in the membrane.

"Dude, I was just listening to some Cypress Hill puffin on a fat blunt of OG Kush and now I'm totally insane in the membrane. Shit hit me hard man!"

insane in the membrane by PsycobetabuckdowN December 4, 2014