When two (or more) people take a short vacation soley for the purpose of getting away from their children, friends, or relatives in order to have private time for sex.
"He was sitting in his room with a thoughtful expression on his face while he had a sescussion whether or not britney spears 'hit me, baby, one more time' should be on his sexy time playlist."
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.