A sexual deviation of Psychadelic. It means pretty much the same as bootilicious. The difference being that shaggadelic is not specific to any meaning, and that it is never EVER used.
*note: If visiting Britain, do not great people with this phrase. Doing so will result in yourself being ostracized. Austin Powers does not represent 60's Britain.
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.