The gayest possible variation of "lol". Sad little unfunny children attempt to use this as a means of "being different from the crowd" when it only makes them look like complete and utter faglords. Anyone normal human being who has any respect for themselves would do right to stay away from this acronym forever.
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 $2 million.