The event horizon of any gathering (social or private) at which the fun and excitement of the moment is bigger or more exciting than usual.
Guy1: "Dood, that party last night went Full Blown Boner right after you left with that Swamp Donkey. There were so many more hotty-bomb-bodies than guys that some of them ended up hooking up with each other!"
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.