Mysterious Cupcake 

When a man puts his penis inside a woman's dirty anus, proceeds to make love to it, and puts his penis in her mouth. He then repeats the process of putting his penis into the woman's dirty anus, but instead wipes it across the woman's eyes. The major event that must occur is that the woman must catch a disease from injesting the remnants of her anus.

Man A: Hey man, I tried out that Mysterious Cupcake position you told me about.
Man B: How did it work out?
Man A: She didn't get a disease so I think I did it wrong.

Mysterious Cupcake by Court Magus January 25, 2010

mysterious male 

Reuben

Reuben, a very interesting crooner more commonly described as a 'mysterious male'

mysterious male by hellogreenbanana December 23, 2015

Mysterious monolith 

The first mysterious monolith appeared on 18 November in the Utah desert and disappeared on 27 November 2020. The second near the Petrodava Dacian Fortress in Romania. The third at the top of a mountain trail in southern California before it also vanished. The fourth on Compton beach, Isle of Wight, UK. Then a gold one in Chia, Colombia and another monolith appeared in the Kiekenberg nature reserve near Oudehorne, The Netherlands.

The mysterious monoliths were appearing everywhere.

A mysterious monolith even appeared in UD.

No convincing explanation for the appearance of these mysterious monoliths has been provided - though it has been suggested that the world's largest dot-to-dot is under construction.

Mysterious monolith by Option 22 December 7, 2020

Mysterious hole 

Mysterious hole is a place you should never visit, never say this word unless you are wanting to be lonely. Just like Lewis please reader learn from his mistake, don't be a Lewis be a Ethan.

Have you ever used a sex toy aka should something up the mysterious hole

Mysterious hole by MilkshakeMan30 October 20, 2021

Mysterious Oysters 

(slang) Typically used when talking about Psychedelic Mushrooms hitting really hard, or either looking to take a strong trip on Mushrooms.

Friend 1: "Last night we were everything everywhere!"

Friend 2: "Dayum broski we were certainly on another quest for the Mysterious Oysters!"

Mysterious Oysters by 13AquaOrbit January 25, 2023

Mysterious circumstances 

Murder/murdered.

My wife died due to mysterious circumstances.

Mysterious circumstances by Ninjajonny_6 February 11, 2023

Mysterious A.I. Breakthrough 

Yeah. Weird, right? I wonder what happened... 🤔 It's like it happened overnight... Weird... What happened there? It was like one day it wasn't even a part of the zeitgeist and them BOOM! It was everywhere... What could it possibly be?

Hym "I mean... I remember there was THIS ONE GUY who said he was doing it... And then he proceeded to explain what you would need to do it why everyone is crazy stupid assholes reeeeeeeeaaaal slow... And he said he would have to do it real slow because, you know, crazy stupid assholes.... And then he explained how to do it... And now the crazy stupid assholes are confused... 'Duuuhhh, what happened guys?' They exclaimed. But they knew what happened. And it was already too late. A mysterious a.i. breakthrough had occurred. Science fiction turned into a reality over night. All because of one man... And..."

Mysterious A.I. Breakthrough by Hym Iam November 26, 2023