In reference to Minnesota-based businessman/con artist Denny Hecker, term is used when you get royally ripped off by somebody to the point where you lose large sums of money or expensive property.
Sean- Dude, I totally thought I got a great deal on Laker courtside seats for the game tonight, but after I paid for them, it turns out the tickets were a fake. Now I'm out ten grand.
Alex- You totally got heckered. You're wife's gonna be pissed.
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.