When one is in the presence of rock and roll style music one tends to display actions which are of quite uncanny nature as compared to daily actions. These actions combined with an essence of hardcore and "rocking out" has been often coined in popular culture as being 'rockcore'
"Hey Brad, how did you like the concert last night?"
"Man, Tommy, it was totally awesome, everyone was going wild, the people in the mosh pit were totally rockcore!"
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.