What is Culpable Neglect?

Legal Definition
In this phrase, the word "culpable" means not criminal, but censurable; and, when the term is applied to the omission by a person to preserve the means of enforcing his own rights, censurable is more nearly an equivalent. As he has merely lost a right of action which he might voluntarily relinquish, and has wronged nobody but himself, culpable neglect conveys the idea of neglect which exists where the loss can fairly be ascribed to the party's own carelessness, improvidence, or folly. Bank v. Wright, 8 Allen (Mass) 121; Bennett v. Bennett, 93 Me 241, 44 Atl. 894
-- Black's Law Dictionary