(a) slander
a slur
【形式ばった表現】 aspersions
cast a slur on somebody's good name
【形式ばった表現】 malign
【形式ばった表現】 speak ill of
【形式ばった表現】 cast aspersions on [upon] somebody [somebody's honor]
stab somebody in the back
slanderous.
読み方 ちゅうしょう
Calumny; defamation; a stab at one's reputation; a stab in the back:(=する) to calumnize, defame (a person or his character); to stab (one) in the back; to stab one's reputation; to breathe upon one's fair name