noun An unexpected natural or man-made catastrophe of substantial extent causing significant physical damage or destruction, loss of life or sometimes permanent change to the natural environment.
People would suffer disasters when society's morality degenerates.
noun An unfortunate or unpleasant occurrence, especially one resulting from an accident or something going wrong.
noun An wholly unsatisfactory result caused by something going wrong or being done poorly; a flop or failure.
the cake was a disaster.
noun A skateboard trick involving a 180-degree ollie, landing on the center of the board with the front trucks facing towards the ramp and the back trucks over the lip. The skater then leans forwards to return in the ramp.