Simultaneous masturbation - primarily between two people who share a spirit - the occurrence of which will often summon a giant Bunny who will smash houses and wreak havoc on neighbors, street lights, and bed sheets.
I'm sorry you broke your arm. Are we still up for Bunny Stuff tonight?
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.