Search engine with a "banning keyword functionality"

The meta-keywords-tag is basically useless since webmasters can make the site look like it contains stuff it doesn't contain (and thereby tricking both search engine and those out to search for something).

However a banning-keyword-functionality (in the webmaster-tools (too use google vocabulary) or in a separate meta-tag) would make it much more difficult to use for deception. (and would sort of be the dual of the meta-keywords-tag).

Compare to how google webmaster tools lists all the search terms that people have searched for (to me as webmaster), and what rank the site gets for those search terms.

The idea is that I should be able to block some of them because I know that my site is not relevant for that search term.

Ex: I have a web page for my master thesis project (link) (About pool-clearner-robots). I tested these machines in some pools, among them was a public adventure bath called Fyrishov (in Uppsala Sweden).

The keywords that ranks highest (for my whole site) and gets most impressions is sort of: "Fyrishov opening hours" (although in Swedish) ... (obviously from people to want to visit the bath and want to check when it opens / closes)

Since i know the page is not relevant for these search terms. I'd like to ban these keywords.

To encourage the webmasters to actually take some time and ban these keywords, the search engine should reward the page by giving it higher rank for the remaining search terms.

Update 2018-April-05

Googles search engine seams to able to handle the problem described in the example.

But for other search engines, with their own version of "webmaster-tools", it might be useful.