Twitter – Turn off Twitter retweets in bulk

Twitter has temporarily disabled this feature

This feature has been re-enabled
Twitter no longer use the Zendesk support site.

Here's a link to the Twitter Support page on retweets:

Select Turn off Retweets from the person icon drop-down menu on a user's profile to stop seeing Tweets they've retweeted.

There are more details of how you can fine tune settings on that Twitter support page, along with an illustration showing how to do it. The page is really long. The section about turning off retweets is about 2/3 of the way down.

Currently (as of March 2019) this is what worked for me:

from:@someone filter:nativeretweets [KEYWORD(s)]

This shows all retweets of @someone (including the optional KEYWORD(s)). If you retweeted the same tweet you can use @yourtwittername instead of @someone.