Specific case : blocking trigger
You have a huge number of triggers that will condition the load of a tag and all the triggers are of the same type.
Connect on your Google Tag Manager account and go to "Variables", then create a new "User-defined variables".
Click on "Varialbes" then "New"
Select "1st Party Cookie" as variable type.
Choose 1st Party Cookie
Name your tag and in the "Cookie Name" box enter: axeptio_cookies then check the "URL-decode cookie".
Configure your variable
Add an "Exception" type trigger
Choose new trigger then the trigger type corresponding to your case (in the example Page View). In this one select some pages views then indicate that your variable must contain "Name_of_the_cookie_you_want_to_trigger":false.
You will now have a cookie that will deposit itself on every wanted pages, except for the pages where the wanted cookie wasn't activated.