as a situation (usually a particularly ridiculous one)
an adjective, either to describe a friend that’s silly or unordinary or a significant other that’s very dear to one’s heart but also shares that silliness
this could be used in any case, depending on the context.
situation:
A: What are you guys arguing about?
S: She won’t remember a song I added to a playlist!
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2million.