I have some blacklists but their only purpose now is filtering out thumbnails instead of me but not really filtering out the posts from my search. I don't want blacklist to be like that as a standard but maybe something like a blacklist tag to make it possible to easily remove (or search) those posts would be much appreciated.
I show 100 posts per page and sometimes there are like 50 (rarely more but happens) blacklisted posts making it to a 50 posts page.
I'm pretty new so maybe there already is a solution to my problem. I would be then happy to get to know how.

You can put - before a tag to exclude it from search results.

Blacklist filtering is client-sided. It's done on your machine, and e621 simply doesn't use that information when it comes to actually populating search results. You'll have to manually add your blacklisted tags to your search.

oberschutze said:
You can put - before a tag to exclude it from search results.

lafcadio said:
Blacklist filtering is client-sided. It's done on your machine, and e621 simply doesn't use that information when it comes to actually populating search results. You'll have to manually add your blacklisted tags to your search.

but for example I can't filter out (solo male -multipage) or can I?
I would appreciate it, if somebody could tell me how if it's possible.

Without using the blacklist, it is not possible to exclude results that have both "solo" and "male" without also excluding results that have "solo female" or "female/male".