Federal Communications Commission (April 3, 2003) Notice of Apparent Liability (NAL). ""Rusty Trombone," and again, please, no kids, no women.
"Rusty Trombone" I believe that's when you're having anal sex with a girl and then right afterwards you make her perform uh, oral sex on you." Obtained July 11, 2007.
Sooke, Alastair. (August 19, 2005) The Daily Telegraph. Want to hear the world's dirtiest joke?[dead link] "While the comics riff about incest, Shetland ponies, oral sex with armadillos and rusty trombones (don't ask), the cornucopia of smut inures you to its own excess." Section: Features; Page 21.