scurrilous
adjective /ˈskʌrələs/
  /ˈskɜːrələs/
(formal)- very rude and offensive, and intended to damage somebody’s reputation- scurrilous rumours
- He wrote a scurrilous piece about me in the local press.
 Oxford Collocations DictionaryScurrilous is used with these nouns:- attack
- rumour
 Word Originlate 16th cent.: from French scurrile or Latin scurrilus (from scurra ‘buffoon’) + -ous.