When a person sharts himself or herself without knowing the shade, volume, or mass of the said poop. The only way to solve the mystery is to de-mask the villain, which by the way is your underwear. Try that on for size, Scooby Doo and friends.
Shaggy: "Zoinks Scoob, Like I just planted a double chocolate fudge surprise in my pants."
Scooby: "Ruhroh Shaggy, guess them Scooby Snacks were expired. Hehehehehehe."
Fred: "Well gang, looks like the Brown Mystery strikes again."
Scooby: "Ruhroh Shaggy, guess them Scooby Snacks were expired. Hehehehehehe."
Fred: "Well gang, looks like the Brown Mystery strikes again."
by superbtoilet February 16, 2014

Hey yo Gerald, let's go solve a mystery in your van after class, and maybe get some Taco Bell on the way!
by Mystery mam March 8, 2018

Unentered vagina, virgin pussy, muff that has never been descended upon, uncharted territory, uneaten pie.
One must have utmost respect for the mystery-muff and only go diving if he wishes to partake in the activities of it for at least another week, seeing as though the availability of such is diminished in urban society.
When demystified you will know as it bleeds for short periods of time, perhaps half a day, and is a mystery to men no longer.
Still classified as mystery no matter what amount of diving one is involved in.
Sometimes used by ho bags to try and convince people to engage them without the use of disinfectant. (see: ho bag)
Sometimes one may refer to the virgin herself as mystery muff.
One must have utmost respect for the mystery-muff and only go diving if he wishes to partake in the activities of it for at least another week, seeing as though the availability of such is diminished in urban society.
When demystified you will know as it bleeds for short periods of time, perhaps half a day, and is a mystery to men no longer.
Still classified as mystery no matter what amount of diving one is involved in.
Sometimes used by ho bags to try and convince people to engage them without the use of disinfectant. (see: ho bag)
Sometimes one may refer to the virgin herself as mystery muff.
by ObWan July 29, 2010

by Chastah_76 November 8, 2009

A senior member of a team who hadn't been involved in the development of a project who then comes in and completely changes the goals or "doesn't like" something the entire team has worked toward and agrres with.
Jill didn't show the brief to her boss, a mystery stakeholder, and now after months of work - he's canceled it because he doesn't like the green color that was used.
by businessSlang September 16, 2012

That abnormally long and thick rogue hair that appears on your **** (*insert chin, neck, cheek, shoulder, nose, etc) only a day after you checked last. Most commonly complained about by women, and most commonly pointed out by a third party when you are least likely to have tweezers handy. Don't even both trying to pluck them with your fingernails...they're virtually invincible.
Sitting in a cab on the on the way to a formal event, the victim's most critical friend looks over and notices an "eyelash" on said victim's chin. With a delicate brush of her finger, critical friend attempts to dust it away, only to be met with spiny resistance. With a maniacal laugh and inability to hide her pleasure, critical friend declares "OMG, you've got a Mystery Hair!". The victim's face pales as she realizes there are no tweezers in her tiny, formal clutch.
(aside: Victim obsessively touches it throughout the evening, only to wake the next morning with the mystery hair twice as long and a small patch of acne).
(aside: Victim obsessively touches it throughout the evening, only to wake the next morning with the mystery hair twice as long and a small patch of acne).
by overanalyzer November 28, 2012

A type of shit that leaves you speculating whether you actually had one because:
A) It went down the U-Bend so went you look you can't see it.
B) The tissue is clean when you wipe
Both these together result in a double mystery and leave yourself questioning your own sanity.
A) It went down the U-Bend so went you look you can't see it.
B) The tissue is clean when you wipe
Both these together result in a double mystery and leave yourself questioning your own sanity.
Person 1: I just took a double mystery.
Person 2: How'd you know, you could have just thought you had a shit?
Person 2: How'd you know, you could have just thought you had a shit?
by OndaLash July 18, 2011
