The most common but under-reported subject area in the field of psychology

Abuse of parents by their children is one of the most common but under-reported and under-researched subject areas in the field of psychology. Parents are quite often subject to levels of childhood aggression in excess of normal childhood aggressive outbursts, typically in the form of verbal or physical abuse. Parents feel a sense of shame and humiliation to have that problem, so they rarely seek help and there is usually little or no help available anyway.

…abuse may appear in one or a combination of five forms; physical, verbal, psychological, emotional, and financial. Bobic mentioned only four of the five listed abuses; verbal abuse was not included in her 2004 article, Adolescent Violence Towards Parents.

Source: https://en.wikipedia.org/wiki/Parental_abuse_by_children