Rusty trombone

[snopes]

Comment: I've heard that the urban legend sex act term "Rusty Trombone"
was coined by one of the writers of Sesame Street, who worked it into the
Oscar the grouch song "I love trash" (in which a rusty trombone is in fact
mentioned) after being told by one of his co-workers about that man's
previous night's activities. Myth or Truth?

[zerocool]

Truth. See supporting evidence of Sesame Street's depravity here