Chaos; a chaotic situation lacking rules or control.
Deathmatch, sometimes specifically one in which every player is pitted against all the others.
Open to anyone and with no or few rules.
Someone (especially a woman) who is unbalanced and considered a mess, a disaster, one who is suffering personal ruin.
The aftermath of a train crash.
A disaster, especially one which is large in scale and readily seen by public observers.
To ruin utterly and catastrophically, to cause to end in disaster.