Muddy Dog

When two individuals are having raw anal doggy style. When the individual penetrating takes their penis out of the reciever’s anus there will be shit on the penis. The penatrator then grips their penis and slides their hand up the shaft to remove the shit. Once all the shit is on their hand they slap it on the back of the receiver.

“Last night I gave your mum a muddy dog.”
“Yesterday me and Kyle did muddy dog and my still smells of shit!”