Mystery machine

The van that has a nice man who looks like Santa clause offering you candy

Santa: hey, look it’s the mystery machine, do you want to see Scooby-Doo

by Norville Rogers April 23, 2020

Mystery Taco

Mystery Taco: When a woman secretly inserts taco meat into her own vagina prior to sex, creating a delicious surprise for her partner, hopefully to be discovered during cunnilingus.

Mystery Taco: It's what's for dinner!

by Bob the Mighty August 2, 2011

head unit mystery

The phenomenon where the original head unit of a test car is unknown, as its head unit has already been swapped with an aftermarket one

I couldn't figure out why the sound quality was so amazing during the test drive—turns out it was just a head unit mystery with that aftermarket stereo!

by Emotional Cruiser October 12, 2025

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

by Jozéy January 1, 2021

mystery finger

It's a mystery finger, the meanest finger to show a person. No one knows what it even means...

Sike. We all know what it is!

See my mystery finger? Figure out what it means!

by Set Blue 23 November 21, 2018

Mystery Blow Hole

The act of having the anus surprise fisted whilst receiving fellatio.

She performed a Mystery Blow hole on her boyfriend.

by Yellowyoshi September 7, 2019

Mystery arse

Only used as a last resort when you have no come back

Shup you ya big smell
Response: You’re nun but a mystery arse

by Ernestas starch December 2, 2019