fleshpiston 

A penis, erect or otherwise

Dat ho hummed my fleshpiston for one fitty.

fleshpiston by Reichard December 12, 2003

flesh piston 

A word for cock that i have now officially coined. Also just like the term flesh pipe and skin flute, except a little different.

Andy likes to have his ass tamped by a flesh piston

flesh piston by Stormin70 August 23, 2010