I'm not sure where "breaker" comes into it, but "necrobumping" refers to posting in very old threads and bringing them to the top again. It is generally unnecessary; a new topic should be started with a link to the old one.
There's been a lot of necro-posting over the last week and it's starting to get annoying. A lot of other messageboards have the software set to lock threads after a certain time since the last post was made. Others have a warning that tells you it's an old thread when you go to post to it (similar to our "there have been new replies" warning").
I agree that starting a new thread with a link to the old one is the best option. It stops annoying necro-posts and also limits "this has been discussed before" responses by showing that the poster is at least aware of the old thread.