mystery booger 

A booger that immediately vanishes upon blowing it out.

It is usually found by someone else hours later, stuck to some conspicuous place on your body.

"Hey, Jim! You've got a big snot on your shirt!"
"Damn that mystery booger!"

mystery booger by Tater Bater May 8, 2020

Mystery Porno 

When you're in a Zoom chat, and you hear a porno playing in the background, but you don't know who's watching it.

When you're watching a porno in a Zoom chat, and you try your best to convince the call that you aren't watching it.

Zoom User 1: What are those strange noises?

Zoom User 2: Mystery porno. these happen way too often.

Mystery Porno by Based Cringe Based Based August 17, 2020

Mystery mouse contul 

When your girl is so amazing and sexy she/he is always happy bubbly out going and loves kids show

Damn your girl is so mystery mouse contul

Mystery mouse contul by Your bigirl September 12, 2020

Mystery shopper 

Another word for a secret shopper.

I’m so excited about my new mystery shopper side gig!

As a mystery shopper, even your friends shouldn’t know what you do. It could blow your cover on a job

Mystery shopper by Jozéy January 1, 2021

Mystery moment 

A moment where Mystery kicks children for pleasure and out of sheer boredom.

Did you just see that? That's a Mystery moment
Mys is kicking children again? Mystery moment

Mystery moment by anotlostman April 19, 2021

Mystery Science Theater Syndrome 

Inability to not make snarky comments while watching.. anything.

I think I might have Mystery Science Theater Syndrome.

Mystery Science Theater Syndrome by Dash Bunny July 12, 2021

mystery night 

On November 18

When people ( kids) throw egg at other people doors mystery night

mystery night by Kiyah. November 17, 2021