It is a process in which one acqiures a fresh pumpkin, preferably one large enough to be pleasurable. One then makes an incision, with a hole comparable to the size of the member in question. One then guides the questionable member into said opening. Begin to repeatedly thrust and withdraw the fresh pumpkin along the said schlong until sexual eruption occurs.
"Yo dawg last night this mad crazy bitch gave me a pumpkin job that I busted a nut all up in that thang! That vegetable was my bitch."