When you suddenly realise something a while after you first heard the information, normally whilst showering.
Person 1: I had a pint this evening!
Person 2: thatchers?
Person 1: natch!
Person 2: natchers ;)
*an hour later*
Person 1: *realises the pun whilst showering*
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.