(n)(sexual)- A male is doing a female from behind. Both are standing and the male is not using his hands so that every pelvic thrust causes the female to be propeled forward some. When the male can move the female arount the room without hitting any furniture he is an "admiral."

Admiral (verb)
A slang term for when hitting it doggy style you slap her arms out from under her and steer her face first around the room/bed/back of your car.

The highest rank in many modern naval forces.