The term used to describe the act of when an individual takes a shit in the tank of a toilet, usually done as a result of revenge or a practical joke played on a less favourable person. When they flush the toilet, the shit is filtered through and exposed into the basin, where it creates a foul smell and a dirty basin.
The Source from where it's coming from remains a Mystery
hey man, reckon i should leave a mystery in that guys toilet ?
nah man, took me weeks to find where the smell was coming when someone did it to me