Slang; origin, Dublin's southside. Involves getting so shitfaced that you completely forget about how you creampie surprised that lucky person the night before, until reminded about it later on the next day.
"Holy shit, I can't believe I fucked up again last night and gave that ugly bitch a Blackout City Creampie Surprise, let's hope she's clean."
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.