A large round object, commonly used for sexual intercourse. Mostly with males, to shove in ones anus and roll around smoothly until one signals to stop!
Oh man Tim that dargasted you shoved in me last nightgave me a rash and made me soar.
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.