by Proffesor bryan August 31, 2010

by Grubby5555 August 6, 2016

by chisel chest May 17, 2014

The part of a man's penis that is hidden from view either under the pubic mound or above the testicles. The inner shaft is not seen but is felt during intercourse.
Kianna: "My God has it gotten bigger?
Joe: "Nah baby that's just the inner shaft. It'll sneak up on ya!"
Joe: "Nah baby that's just the inner shaft. It'll sneak up on ya!"
by elpolorico January 20, 2016

I knew then when blazer sent a gerbil through his ass in a tube that he may be doing the purple shaft
by Backhand Brooklynn January 29, 2022

A mans and maybe a woman’s(hope not) private under there shorts that can get hard when they see something they like
by Chance_larger06 June 23, 2019

The mythical, most important part, and cause of all inexplicable failures, in any complex mechanical system, from an automobile to a starship.
by opposito June 23, 2017
