When something that you think should taste like ass, ends up tasting pretty good. Or anything metaphorically equal. As in you thought that was going to suck... but it didn't!
"Well Joe I thought having sex with that chubby girl was going to be a bad time but it turned out to be sphincterlicious."
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.