WCDT is an american government/military acronym for "We Can't Do That", it is used as a noun for a person in a position where he has to say "no" to other people ideas.
Mike is the S2 shop new WCDT, he just xnayed my op plan for that taliban fort.
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.