A person who is addicted to concussive shock. Grunts in ecstasy (unnhhhh) as s/he hits the top of each bump with a resounding "WHAP! Uungh! Sssnnt'' Usually followed by ecstatic writhing of the body.
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.