A sentence invented and uses by famous gonzo pornstars as Rocco Siffredi and nacho vidal.
The woman is on top of the man with his
dick in her ass or in her pussy.
The woman should move her ass in a
circular motion (sexy dancing) and by doing so arousing and increasing sexual pleasure to her partner.

A polite term for shoving a lubricated probe into the Earth's hole to release gas.