Just like the Boston Shot glass: where a bloke jizz's into two shot glasses and one is inserted in her vagina and the other shot glass is inserted into the arsehole of your partner.
G: Hey Bakes, I gave your grandmother a double boston shot glass.
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.