Adjetive used to describe either a band, celebrity, or person who often describes itself as "alternative", but usually watch MTV and go shopping at American Eagle Outfitters.
Comes from the next equation:
Mainstream + Alternative = Maltstream
Radiohead, Muse, Phoenix, and Vampire Weekend are so maltstream, you better listen to some GIRLS album
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.