a lexical mistake, usually in the form of a commonly-used term used in place of a more obscure term.
Some examples of eggcorn are to ferment trouble, the prostrate gland, potatoes old rotten. The writing teacher corrected the eggcorns in the student's composition.
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.