Burgeoningly delicious or extra luscious. A state of "damn, that is some tight shit". Often referred to as, "WHOA" hellafine is a very powerful word and should be used with caution. Often used in describing people descending from the UAE.
"Look, Michael, that girl is hellafine"
"Good Job Billy, you did a hellafine job in that soccer gametoday"
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.