Proverbs 17:4 says, “The evildoer listens to wicked lips.”
I think it is significant that the verse does NOT assert that the evildoer HAS wicked lips himself; rather that he LISTENS to wicked lips! In other words, it is not enough for the follower of Christ to just avoid speaking evil, but to determine not to LISTEN to the “trash talk” of others! Do not give the ungodly words of others your attention or interest. It is not a matter of just being defiled by hearing them; you are inevitably influenced by what you listen to as well.

— this applies to our personal relationships and who and what we listen to at school and at work. Don’t be a party to gossip, slander, or impure jokes. Don’t even honor it with your feigned interest.
— it also applies to what we listen to on television, radio, movies, etc. Many of us put up with garbage from our entertainment sources that we would never put up with in person. Why would we do this? Not only is it a sign of compromise, it ends up affecting us. So determine to keep away from evil, by not even listening to words and counsel of the wicked.
The bottom line is: it is not enough for you personally to avoid speaking evil today. Ask God for the grace to help you not to even listen — in any form or fashion — to wicked lips!