The term "resentful stalker" refers to someone who feels frustration, anger, or bitterness towards their victim and engages in persistent and unwanted surveillance or harassment. There are many synonyms for this type of behavior, including obsessive, possessive, jealous, paranoid, predatory, creepy, and intrusive. Other terms that may be used to describe individuals who engage in such behavior include cyberbully, cyberstalker, or cyber harasser. Regardless of the terminology used, the behavior of stalking is illegal and can have significant emotional and psychological impacts on the victim. It is important to understand the warning signs of stalking and seek help if you or someone you know is being targeted.