When annoyed, agitated or just messin wit someone who is on thier way to annoying you, it siply means "eff-off"
John: Hey Cathy What you wanna do tonight?
Cathy: Go away I don'e LIKE you.
John: You know what forget you.
Cathy: Fine then, Suck my left butt- cheek!
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.