combination of the word "busted" meaning "overly good" (syn. "imba") and the word "nuts" meaning "the best possible thing".
In short, it means something that is of exceptionaly quality.
"Medics are the busted nuts"
"The Uzi is the busted nuts"
"Glare of Subdual is the busted nuts"
"I will bust your nuts"
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.