The invisible monster that lives in your garage, usually under the car, that eats dropped screws, sockets, irreplaceable hardware, valvelocks, etc when dropped on the floor and not located immediately. 10mm sockets in particular are a delicacy.
Damn it, I just dropped my last 10mm socket. I better find it before the garage floormonster gets it.
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.