Upon viewing of the anus close up during flatuation it is apprent that the inner ass protrudes slightly and pulsates or vibrates.
by The professional December 3, 2004

Dib Membrane's horrible, yet rather sexy father from the early 2000s nickelodeon cartoon 'Invader Zim'. Professor Membrane is a 12 foot (at least) tall world-famous scientist, who neglects his kids, but on the bright side he has incedibly hot robotic arms after losing his fleshy ones to sharks. He is a DILF.
"Professor Membrane is my favourite Dilf"
"Simping for Professor Mmebrane is not a healthy coping mechanism, Kyle."
"Simping for Professor Mmebrane is not a healthy coping mechanism, Kyle."
by Ghost McBox April 13, 2021

A membrane keyboard is a horrible keyboard 8 year olds use because they think it’s good because it has rgb. It is not they suck they are the worst things to ever exist. If you have a membrane keyboard and like it I am going to assume you play fortnite and enjoy it.
by C8 TM March 11, 2021

"Sorry, you're breaking up . . . What? . . . I said, HOW'S THAT URINARY TRACT INFECTION HEALING? . . . What? . . . No, of course no one can hear me -- I'm surrounded by the cell membrane."
by Leeuwenhoek April 18, 2010

by Eric April 7, 2005

A sexual act involving the thumb in the vagina and pointer finger in the ass and rubbing the membrane between the 2
by AndyK_79er July 2, 2011
