Estonian 

The worst mental illness there is

Thomas: hey, what is that mental illness you told me you have?
Kadri: I am Estonian
Thomas: Holy shit get the FUCK away from me!

Estonian by Sakivsiil October 20, 2023

Estonian Exenity

When your friend wants you to fuck them but you are in the middle of cloning everything in your house so you accidentally clone your friend with your penis inside and now you have two penises and two friends.

I gave Arnibald the Estonian Exenity last night.

Estonian Exenity by Tomsklvr33 March 16, 2026

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