Yes, grabbing the back of someone's neck really hard when they are angry with you can be considered physical abuse. Physical abuse involves the use of force to cause harm, injury, or discomfort to another person. Any action that inflicts pain, fear, or physical harm on someone without their consent is abusive behavior.
It is important to understand that physical abuse is not acceptable under any circumstances in a healthy and respectful relationship. Regardless of the reason or the intensity of the anger, resorting to violence or physical aggression is not an appropriate way to express emotions or resolve conflicts.
If you or someone you know is experiencing such behavior, it's essential to prioritize your safety and seek support. Reach out to friends, family, or professionals who can provide assistance and guidance. No one deserves to be subjected to physical abuse, and there are resources available to help you navigate through such challenging situations.