A slide whistle is a blowjob, specifically a blowjob given while manipulating the balls to increase pleasure. This is analogous to using a slide whistle where the person blowing the slide whistle will pull on the slide to change the tone of the instrument.
Nate: I offered the guy next to me a slide whistle so he would watch my stuff when I went to the bathroom.
by TesticularCancer November 24, 2014
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Basically the gender reverse of the rusty trombone. That said, details matter. As the gentleman lovingly rims the fair maiden, he rubs his index finger along the moistened edges of her (insert preferred term) for her comfort. Next, slowly insert said finger in the aforementioned, while lovingly whistling the tune of her choice, hence creating a chorus of musical pleasure.
Ah girl, my man played me "patience" on the rusty slide-whistle last night, Guns-n-Roses never sounded of felt so good.
by lavoinha August 26, 2006
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A place between heaven and hell where the great musicians of a given time period go when they die, where they are sentenced to an eternity of playing the slide whistle in grimey underground clubs.
-Dude, I wonder if Kurt Cobain is in Slide Whistle Purgatory

-Dude I was at this underground club and I could've sworn Kurt Cobain was there in slide whistle purgatory
by word=word April 2, 2010
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Musical term referring to the sound produced by the escaping of air caused by repeated extraction and insertion of a well lubricated penis into and out of a male's rectum. See also: skin flute
"do any of you play any instruments?"
"Mork and I have been know to jam out together on the skin flute and baritone slide-whistle"
by nathan mork March 8, 2007
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The Rusty Slide whistle begins with a woman furiously blowing into their male counterparts asshole, while simultaneously tugging his johnson. This act replicates the steps required to play the slide whistle, thus warranting the name.
"Yo, last night Justine busted out the rusty slide whistle, we made some sweet music"
by Matthew Mcconaughey's peepee November 29, 2019
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A sexual position in which the male inserts his cock into a one gallon jug filled with feces and urine, and then a woman gives him a blowjob while the man plays a slide whistle
Damn Joey, I heard Steve gave Cheryl a slide whistle Willie!! I can’t imagine what that tasted like. She must be a real slut
by Nigger bob square dick August 30, 2023
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