It is when you are talking loud enough for someone you are talk smack on to hear you talking that smack but made to look like you don't know they can hear you. It's an echoing of laughter created by your words disguised as simple nonsense.
Creators and Originators to be credited to: Sgt. Sean Richard Grilley & Lance Boyd Holliman III
Coined in 1995 So. CAL.
R.I.P. Sgt. Sean Grilley.
I could hear them loud and clear, that Labraneatrium they are using doesn't fool me.
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.