Stop breathing my air is something you say to someone who is a complete waste of space. It is most commonly used when someone has said or done something unbelievably stupid.
Example:
"Yo, did you hear about that Hitler guy? Someone needs to stop him!"
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.