Slander, defamation, or abusive statements that harm someone's reputation, often malicious or untrue. Can correspond to legal concepts like libel or defamation; used as a noun and as a verb (～する).
彼はネットでの誹謗中傷を受け、名誉毀損で訴えた。
He was slandered online and sued for defamation.
有名人は誹謗中傷に悩まされることが多い。
Celebrities are often troubled by slander and defamation.
あの書き込みは明らかに誹謗中傷に当たる。
That post clearly constitutes slander/defamation.