"Negligence"
This is anything that a smart lawyer can stick on you by using the legal system, generally on the basis that their lawyer is smarter than your lawyer. It is particularly valuable in those countries where lawyers are paid a percentage of the "damages" that are thereby collected, and most useful of all is where some connection, however obscure, can be found to an organisation in the United States so their law system can be involved.
Any connection with the real meaning of negligence, or justice as commonly understood, is purely coincidental.