worthless as a whistle on a piss-pot 

Self-explanatory. There couldn't be much more worthless than that. Alleged by a young lady I used to bang to have originated from her father.

Jesus H. Roosevelt Christ. That boyfriend of yours is as worthless as a whistle on a piss-pot.

worthless as a whistle on a piss-pot by PFesser April 19, 2018

Tibetan death whistle 

To perform this you must be an expert at Tibetan throat singing. The actual act is sexual in nature as you would bend over your partner and start singing into their asshole. Has to be high or low pitch vibrations strong enough to feel it on the insides.

I'm gonna take you home and show you how to Tibetan death whistle baby.

Tibetan death whistle by Excalliburrito April 30, 2022

Armenian Shit Whistle 

During sexual intercourse a slide whistle is inserted into the partners anus and defacated in. The whistle is then removed and played by the other partner.

Partner 1: “hey, can you give me an Armenian Shit Whistle?

Partner 2: “sure! I’d be happy to”

Armenian Shit Whistle by bss120 June 13, 2022

Swim for the whistle 

Intentionally engaging in act until you are told or made to stop.
Originated when a group of friends would go to the beach and swim out into the ocean until the lifeguards would blow the whistle to make them come back.

When drinking at a bar it may not be a good idea to swim for the whistle.

Swim for the whistle by BMoreDictionary September 24, 2022

Bitch Whistle 

The plastic remains of a tampon after insertion.

Jeff: Yo dude, WTF is wrong with your toilet!?

Pat: This stupid fucking broad tried flushing her bitch whistle down the goddamn toilet and clogged that bastard!

Jeff: That's fucking weak....and gross dude.

Bitch Whistle by Slick Rick 'Tha Ruler' April 3, 2010

Beef Whistle

A term coined by Fred Bliss, a slan term for penis. The original word was used in context one day at Chandler's Tavern, a restaurant at the Yankee Candle Company.

The term was invented in the summer of 2000.

Actual excerpt from the conversation where it all started:

Larry said: "She was so pissed off!"
Fred said: "He's lucky she didn't kick him right in the beef whistle!"

Beef Whistle by Fred October 25, 2004

pioneer whistle 

When you grow out your scruff and then go down on a freshly shaven pussy. You give her a good scrape with the beard and hear her whistle.

I just got back from camping and gave that bitch a Pioneer Whistle!

pioneer whistle by Harry Ballsteen June 28, 2006