Okay, I THINK I figured out how the filter thingy here works.
1. Click the Settings icon on the top right of a column
2. Scroll down to 'Advanced'
3. Put a text like this in the 'Filter out by regular expressions' box:
@.*bot\s|@someone\s|some word|more words
^ This would mute ALL toots that CONTAIN
1. usernames that end in 'bot' (but not ones that have 'bot' in the middle)
2. user @someone
3. words 'some word'
4. words 'more words'
Sadly it can't seem to filter out emoji like
Note that this ONLY mutes toots that CONTAIN these phrases, it does NOT mute USERS 😅