(Typically) Consensual anal sex between two parties that achieves deep, unprotected penetration with the aim of filling one (or both) party's colon with rich seminal fluid.
Guy 1: Hey, where's that £6.25 you owe me?
Guy 2: I'll get it, I swear.
Guy 1: You better, or you'd best start preparing yourself for colon colonisation.
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.