(noun) The invisible device that you use during the rapid eye movement stage of sleep known as REM to perform all the usual smartphone tasks and then wake up from REM to find there's actually no device in your hand.
Bob exclaimed, "Damn! That's the third time this week I woke up strokin' my remiPhone only to realize I was half asleep."
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.