smashup

noun3

1. •
   An instance or the result of smashing; that which has been smashed into pieces.

   • I discovered that a lot of imported drainage-pipes for the settlement had been tumbled in there. There wasn’t one that was not broken. It was a wanton smash-up. — 1899
2. •
   (informal) An abrupt, damaging breakdown or failure.
3. •
   (informal) A violent collision involving one or more vehicles.