Gossip is spoken of badly in the Bible. I believe here that this is speaking of spreading untruths about the neighbors. If you were called to court to testify, you would have to tell the truth about the neighbors, but just telling things to get rumors started is bad.
Avenging the evil done by one’s neighbor by offering false witness against him is forbidden.
Deceiving with the lips, perhaps, means stretching the truth to harm someone.
Under Gods command 