Bad Neighborhood – in SEO means a bad site that you are linking to. If google finds that you are linking to a bad site(link farm,spam sites etc), then google can penalize you and drop your page rank. Many a times, this happens as one doesn’t analyze completely the sites he is linking to.As a result google drops the page rank and it comes as a shock!
Here’s a cool online tool that will enable you to check for any bad neighborhood links on your site.
It may show some annoying results though, like for instance it shows my blog as “blog spam” as there are too many out going links. But this is OK as it’s normal for forums and blogs.
It’s a good tool if you just need to analyze a huge number of links and decide what to keep and what not. Check it out!