Before having sex first the lady will take an exessive amount of laxatives. Next the gentleman will prosition her into the pile-driver position and then start banging her ass. Eventually she will have to take a shit, you keep on going until the last minute. When you pull out there will be enought pressure behind the shit (probabley diarrhea) that it will exit the ass looking like when a someone strikes oil.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.