When you're playing a war game, and you suddenly are hit, it is common to say "omgmissile". This became adapted just to be said in general online chat, and is often shortened to omgmsl, which is mistaken for omgmisled.
John: omgmissile, I wus hit!
Paul: omgmsl, UR such a 'tard..
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.