defamation
https://gyazo.com/a50ed6ffa3d7944103306a6f3d180f9d
source: ネットの誹謗中傷のイラスト(女性) | かわいいフリー素材集 いらすとや
noun
the action of damaging the good reputation of someone; slander or libel:
⦅かたく⦆ 中傷, 誹謗; 名誉毀損
e.g. she sued him for defamation.