Washing the whistle 

The action of plunging a hose down a urethra to clean out the unwanted fecal excrement

Its about time I got a good “washing the whistle” done.

Washing the whistle by Ayalanews89 August 22, 2019

Boo boo whistle 

Noun

A fart; may be used in reference with flatulence.

Grandma took communion on bended knee, proceeded to stand up and blew her boo boo whistle. The congregation gasped.

Boo boo whistle by Awsnapsonitson September 12, 2019

Rusty Slide Whistle 

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"

Rusty Slide Whistle by Matthew Mcconaughey's peepee November 29, 2019

Japanese War Whistle 

A turbo in other words

I pull up to the light and a Mustang revs at me, I let my Japanese war whistles scream and I dust him from the green light

Japanese War Whistle by KingxxMari December 22, 2019

whiskey drinkers whistle 

a wet so intense that it is wetter than normal

my girl was so turned on that her nether regions were wetter than a whiskey drinkers whistle

whiskey drinkers whistle by Samran53 October 21, 2020

Fiddling with my Whistle 

A Violin and Tin Whistle YouTube Channel, that makes 'play along' Tab tutorials

Has over 100,000 Subscribers

and gets over 1.2 million views per moth

Have you learn how to play that fiddling with my whislte tutorial
Fiddling with my Whistle must be the best violin teacher in the world

Fiddling with my Whistle by Fiddling Whislte January 11, 2021

3-Tone Whistle 

A whistle commonly used on and near Evergreen St. in Tucson. It’s used to signal if the police are present or on their way to a location, or, to signal other people that there is danger in that area. Or also used as a way of checking if an area is safe or not.

Person 1: I was walking past the Grove and somebody hit me with that 3-Tone Whistle and I dipped.

3-Tone Whistle by anonymous March 25, 2021