Similar to motorboating, but done between someone's ass cheeks. When someone places their mouth between someone's ass cheeks and then shakes their head violently while making motor sounds with their lips.
As coined in Episode 86 of the Wheels Off Liberty podcast by one Jamie Crane.
To go dogging in Mcdonald'sdrive thru and having the staff there watch you before making your order as normal and then finishing off in front of window 3 before taking your food and having post sex munchies.
Niki: Steve let's go Mcdogging!!
Steve: Yeah ok sounds great, What we gonna eat though?
Niki: erm we will have a quick break and check the menu out on our way through :)
Steve: Ok :D sounds great, cant wait!