When a person (usually, but not necessarily, of Latin descent) who otherwise speaks in unaccented English suddenly has a very heavy accent for a Spanish word or name in a sentence.
Person A: "Hey guys, I'll be right back, I'm going to go get a PEENYATTA for Timmy's birthday party."
Person B: "Stop spicking it up John, you spent like one semester in Ibiza."
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.