Possible Duplicate:
Is it possible with Google searches to ban any and all results from a domain?
When searching google a few sites constantly show up in my search results. However, these sites are never relevant to me. Is there a way to blacklist sites by domain, regular expression or other method? Preferably I would like to do this prior to any searching and not in the search string each time I need to Google something.
Each time I come across a new site that is spammy or otherwise not relevant I would like to be able to easily add it to the blacklist.
I use a mixture of Google Chrome and FireFox on MacOSX Snow Leopard. I am not opposed to using plugins if there aren't any settings that can be applied to the Google search engine itself.