farmer brown's cock

Deficating while having anal sex.
To deficate on the penetrating object, be it a penis or any other penetration device or shape.
More specifically, the act refers to a Penis repeatedly penetrating the anal cavity whilst a degree of anal waste it forced out and ejaculation inserted, know as a "Farmer Brown's Cock".

On the way home from the Asian Restaurant, Den suggested that anal sex while deficating would round off a beautiful evening "Don't use the toilet tonight my love, Farmer Brown's Cock is making an appearence."