The opening phrase of the hip hop song "Bad and boujee ft. Lil Uzi Vert" by Migos.
This was quickly turned into a rather popular meme.
...
NOBODY KNOWS WHAT IT MEANS BUT IT'S PROVOCATIVE
IT GETS THE PEOPLE GOING
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.