a speech to convince one to have sex using an overly exaggerated or lame excuse. in other words it's the speech that leads to apocalypse sex.
derived from the series supernatural s.6 e.10
Dean Winchester: Hmm. So, dangerous mission tomorrow. Guess it's time to eat, drink and, you know, make merry.
Jo Harvelle: Are you giving me the Last Night on Earth Speech?
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.