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A rusty trombone wherein the recipient of analingus and a reacharound concludes by urinating rather than ejaculating.
James drank a large quantity of coffee early in the morning, so his anticipated rusty trombone instead became a shiny trombone.
by timpanum September 20, 2014
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during sex when a girl ejaculates and the guy pulls out and it's all shiny with cum
"Dude you should have seen this chick, she gave me the best shiny trombone ever"
by godsflesh January 20, 2008
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