The Estonian jackhammer

When a man spreads the woman's vagina flaps and attempts to stick his head into it. This normally ends up with a trip to the ER as it is not safe for both genders. This can be done with the same sex (see Finnish jackhammer).

Brian: "so I gave Sandra the Estonian jackhammer last night!"
Andre: "is she ok?!?"

The Estonian jackhammer by The isis November 12, 2014

The North Dakota Jackhammer 

When two women use two double sided toys, one for each hole (bootyhole and vayjj) of each woman.

"I heard Susan and Becky did The North Dakota Jackhammer."

The North Dakota Jackhammer by Wheels97 February 27, 2021

The Jackhammering Honey Buster Delight 

When a man fucks another man upside down bouncing up and down in a block of honey. They then proceed to freeze the honey and fuck in sub zero temperatures. The genitals swell up and create an expulsion of fat cum shots. Then they shatter the honey and die together

I attempted the Jackhammering Honey Buster Delight yesterday

The Jackhammering Honey Buster Delight by The Cum Sock Master August 15, 2023