When a female of the heavy-chested persuasion looses control of her chest support causing boob-flesh to smother everyone in a five mile radius, cause blindness, as well as spontaneous boners.
Can be used in conjunction with the term tit-ripple, which usually precedes a titalanche through the snapping of a bra strap.
"For gods sake don't cause a titalanche, it'll be like a rubber raft going off in the back seat of the car!!!"
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.