Remove a tag for all messages matching a search term

Command-line based program for indexing, searching, reading, and tagging large collections of email messages.
More information: <https://notmuchmail.org/manpages/>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

notmuch tag -{{custom_tag}} "{{search_term}}"

click the source code to copy install notmuch on any operating system with command-not-found.com