Romantic/emotionally intimate, non-platonic relationships whether dating, courtship, marriage etc. held by someone with more than one other person at one time with full disclosure among all parties.
There's a name for people who are open to plural romance; it's a normal fucking human who is alive.
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.