Definitions by Narcuul

Doggie Thumb 

While having sex with a girl in the doggie style position, sliding your thumb into the anus and rubbing yourself through the wall of skin separating the two.

I was getting my girl from behind last night, and I slipped in the doggie thumb. The way it makes her squeal makes me grin every time.

Doggie Thumb by Narcuul September 19, 2009