A penis with many warts/scars on it.

A severely aged penis.
"Hey Sally, I unzipped my boyfriends pants the other day only to find out he had a rusty trumpet, so I dumped him on the spot."

"Old people don't have sex because old men get rusty trumpet."
by Ginger Loaf December 12, 2005
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Sticking your thumb up a females butt while goong down on her. Later, sticking said thumb in her mouth during intercourse. Not quite the Rusty Trombone. Its the Rusty Trumpet
Jeff, was she a good girl or a freak? Bro, all I'm goona say is I gave her a solid Rusty Trumpet and she took it like a champ !
by SoggyBottomz October 8, 2016
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Similar fo the Rusty Trombone just in reverse typical male and female fashion. The male rims out the women and commences diddling her piddle with multiple fingers in a trumpet like fashion.
Dave: What did you and Jill do last night?
Aaron: We started our own brass band!
Dave: She gave you a Rusty Tombone?!?
Aaron: And then I gave her the Rusty Trumpet!
Dave: NICE!!
Aaron: And then we each drank a bottle of Listerine so as to not get E-Coli.
by Jasper Stupolotics July 21, 2008
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When a woman (or man) is giving a Man a blow job while humming (like a trumpet) and using three fingers to stimulate the balls.

The goal of the rusty trumpet is not for the man to orgasm, but for the man to fart.
Man: Hey baby, you want to give me a rusty trumpet?

Woman: What's that?!?!

Man: Well, you slob on my knob like corn on the cob, then use tree fingers to massage my balls, the job aint done until I fart! Wocka Wocka!
by Wocka Wocka Wocka August 21, 2009
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Candy's eyes lit up as Sandy tongue punched her date and reached around to complete the rusty trumpet with jazz like vigour
by Mickyoubastard May 16, 2018
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Sitting on your partners chest, with you penis in their mouth, you ejaculate into their mouth as you simultaneously fart on their chest, giving the illusion that they are playing the trumpet with your cock. Extra bonus points are awarded if you manage to shard at the same time.
"Bill always leaves a stain when we do the Rusty Trumpet", Kelly complained.
by Pango_X May 13, 2006
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When a sexual partner licks a males asshole while simultaneously reaching between the legs to fondle his testicals similar to a Rusty trombone.
Ida gave Ben a Rusty trumpet in the handicap stall.
by opie3855 August 8, 2018
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