something damaging and untrue
scurrilous - offensive
If something is ‘scurrilous’ then it is variously offensive, cruel, unfair, and false. The word is usually used in relation to rumours, accusations, remarks, etc. A person’s intentions behind doing something scurrilous are typically bad and meant to cause damage. As such, they may face negative consequences for engaging in such behaviour.
Don’t listen to the scurrilous rumours. They are being spread by people trying to undermine my position at the company.
Alex will face some form of disciplinary action for the scurrilous remarks he made at the meeting.
The government’s official report did not tell the whole truth. A lot of important information was scurrilously omitted.