What does ass pimpin mean?

ass pimpin meaning in Urban Dictionary

v. Whenever you're engaged in missionary sex, the partner hits around and places a dildo inside ass when you simultanously rail the woman (or him I guess, have no idea how it would work but I am sure somebody features found an easy method). Registered into preferred use after it was popularized on HBO drama The Sopranos whenever Christopher Moltasanti requests an ass pimpin.