The act of performing anal cunnilingus while reaching up above the testicles to manually administer quick up and down motions to the penile shaft; resulting in a violent yet pleasant explosion. It is then customary for the female to then give a quick blow into the anus for good luck, the lips blowing into the anus sounds very similar to a trombones sweet melody. This was introduced to the Americas in the late 50's.
While receiving a rusty trombone I lost control of my bowels.
The act of prolonging a bowell movement by flexing the sphincter muscle. Sometimes the pinch is not administered in time which leads to a head of feces protruding resembling a turltes head; making an unpleasant mark in the undergarments and resulting in a foul odor.