When you mount a woman for an aggressive titty fucking after having dropped a steamy pile without wiping so you leave a thick muddy streak down her abdomen.
I had the perfect shit last night, and to top it off I gave the old lady a nice Oxford Wagon Rut
A fecal brown streak left on the abdominal region after a titty fuck.
The titty fuck she gave me caught me off guard. I accidentally gave her an Oxford Wagon Rut, as I had previously failed to appropriately cleanup my beer shart.