To sue for damages, seeking compensation for the slightest violation of rights. Often this involves the prosecution not having common sense. See nanny state, political correctness, idiot.
Suing a cigarette company because you got cancer, which may have been caused by the smokes. Because there was no clear warning, despite it being well known they are dangerous to health(documentation dates to world war I), the prosecution claims she was not aware and sues for billions of dollars.
A commitment or obligation to keep the good word. If not met it may result in a litany of saints.
He had many litigations to keep or it was off with his head.