When you are having sex with a girl doggy style and promptly punch her anus with a ring pop whilst still having sex.
"Yea I really caught my girlfriend by surprise last night after the movies. I hit her with a green lantern and she had no idea what to do" aka The Green Lantern
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.