Related to the Skay, a stealth skay is used when a fear of being apprehended is present, or when one wishes to allow people to relish in the tanalising aromas of your skay. This is achieved by shitting behind the seat of the toilet, after which one lifts up the covering seat, blocking the view of said skay.
A very bad smell. Stinky.
A combination of the words: 'skunk' and 'anus'.
Background information: My Scottish mother-in-law (I'm Canadian) and are always (jokingly) finding new ways to insult eachother. 'Skaynus' was a new way!