The Ruda Tuba - (rooda toobe a)
After
fucking a chicks yatch hard (preferrably in the doggy position), you proceed to flip her on her back, grab her by the ankles, bend her knees to her chest, and make her queef. Repeat this maneuver by pumping her legs as if you were
playing a tuba. "Ruda" is short for
Rudimentary.