An expression used by people who have a pet cause, and don't want anyone questioning that cause. A fast way to shut down a conversation from anyone deemed too outside to participate, no matter what their level of qualifications.
"Don't go telling me to vaccinate my kids when you don't have any. Stay in your lane."
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.