A cock with a overly large head shaped much like the cap of a mushroom. The result is a (or what seems to be) a thin shaft with a mushroom cap like dick head.
Hathaway: (pulls down pants)
Dow: Nice cockshroom, now go shove it in a rusty blender
Bill: Couldent have said it better myself
Dow: Nice cockshroom, now go shove it in a rusty blender
Bill: Couldent have said it better myself
by Fugget McDoogel December 07, 2006