When you find some random stranger's sock in your pile of laundry.
I was folding my laundry and I found a mystery sock! Barf!
A quality possessed by events or individuals carrying an inherent sense of danger but an inexplicable attraction to explore its possibilities.
Jason: "Did you see the girl in the skirt with the crazy mysterious eyes? I think if I talked to her, she'd cut me but I just can't walk away."
Full name: “Mystery, Babylon the Great, the Mother of Harlots and Abominations of the Earth”. To refer to whores who have no self respect, absolute hatred towards righteousness, willfully accept and participate in worldly demonic activities among anything else that displays hatred to the Lord our God and his created image.
Silence, Mystery Babylon! Repent and believe the gospel or receive the mark of the beast and be damned to the lake of fire.
The act of having the anus surprise fisted whilst receiving fellatio.
She performed a Mystery Blow hole on her boyfriend.
A shit that comes out so fast, you can't decide if it's liquid or solid.
I took a mystery shit last night.
When some unexpectedly kind of liquid sprinkles on your head/body, and you have to touch it with your hand and look at it to identify the liquid. This usually happens when it's not raining or when you're inside. The build-up to the reveal is always intense, yet 9/10 times it's still water. You always think it's birdshit or some kind of bodily fluid.
"I walked beneath a tree yesterday and got a mystery sprinkle. I thought it was birdshit but it turned out to be just water."
Finding an unknown object and t-bagging it.
Tim: What's that?
David: I don't know
Tim: *T-bags it*
David: MYSTERY T-BAG!!!