A nonquest is a (normally sexual) conquest that never actually happened. Often referred to in the past tense, once you have entered the 'friendzone' with a person you thought you might have had a chance of sleeping with.
'I wish I'd slept with her whilst I had a chance - she's my greatest nonquest'
Man 1: You remember that girl that used to barmaid at the Ships Head?
Man 2: Yeah, she was fit - didn't you get it on with her?
Man 1: No, she was one of my nonquests.
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.