South Dakotan slang term originating from the Chamberlain/Oacoma area, circa 2002.
An act of gross incompetence which results in utter distaster. A wanton act of stupidity. Unintentional destruction brought about by sheer lack of common sense.
He thought it would be cool to repaint his car using fourty cans of spray paint, but all he did was completely randalize the damned thing...
Dude, if you leave that cheeseburger frying on the grill for half an hour, all you're going to do is randalize it!
If you don't put the drain plug back in the oil pan after you change the oil in the car, you're going to randalize the engine, idiot!