I don’t think there is a way to do so through the website front-end. If you use Android, the Sync for Lemmy app has a keyword filter though, it’s amazing to filter out the whole politics spam.

Thunder on android and ios has a keyword filter.

Like the other guy said, there is no keyword filter built into Lemmy itself, gotta use an app.

Sync allows you to filter posts by keyword in settings. Here is my block list: https://lemmy.ml/post/4194272

You made me look that up in my app since I have the exact same issue. Voyager has a function to do this exactly. You‘re welcome. :)

If you use a browser, sone extensions for parental control allow you to filter out words or replace them with other ines . Helped me a lot to clear my mind.

In the app I use (voyager) there is a settings category to allow filtering words, users, communities or even instances from your feed.

I banished Elon, Musk, and Taylor. The word swift would have been good too but it’s not specific enough to her name.

Here is a guide I once wrote on how to do that in the Eternity app for Lemmy on Android:

https://discuss.tchncs.de/post/6091026

I remember seeing a post on lemmy blocking posts with certain words on firefox (and its derivatives) with ublock origin.

1. Open My filters tab in ublock origin extension settings.
2. To block posts with word random on lemmy.ml, add this to text field lemmy.ml##div.post-listing:has(span:has-text("/random/i"))'. i after random/ matches case insensitively.