I made this one up with my friends. It is the act of giving somebody a BJ while having a load of shit in your mouth.
P.S. dont do this
"hey baby, I left a load in the lou, you wanna use it for a General Lee?"
"sure honey, id love to put shit in my mouth, especially your shit."
(two days later the FBI stormed the house and found a dead woman who had supposedly choked on poop)