A note I found from John Piper on gossip:
The New Testament warns against gossiping. The Greek word translated “gossip” means whisper or whisperer. In other words, the focus is not on the falsehood of the word but on the fact that it needs to be surreptitious. It is not open and candid and forthright. It has darkness about it. It does not operate in the light of love. It is not aiming at healing. It strokes the ego’s desire to be seen as right without playing by the rules of love.From Desiring God