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 01, 2011
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.
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?!
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?!
by uwanttruthitellz May 10, 2009
by Adam Rhys Campbell November 11, 2020
the cell membrane is the gatekeeper of the cell
by funkyfunkster January 17, 2022
Two females performing 69 underwater, using each other's vaginally cavity as a re-breathing apparatus.
by BluntedBlazer December 31, 2017