a mental collection of pornographic, sexual material that one may use for masturbation. See also wank bank. One is usually prompted to refer to the skin bin when they have seen something that turns them on.
That's one for the skin bin
by Babymother February 12, 2008
A female vagina. A place to insert a male penis.
Hey dude, did you stick your wiener in Brittany's skinbin last night?
by Nala HotTub June 19, 2011