To masturbate; esp. of a female, and usually in a bathtub. (Originally in reference to the amount of time required to prepare for female masturbation, such as drawing a bath, lighting candles and incense, etc.)
A: "I'm going to 'make an evening of it tonight'."
B: "Don't forget to wash the yellow ring off from around the tub afterwards."
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.