When I was looking for a fitting domain I had the same problem as anyone: All fitting domain names were seemingly reserved.
While storing away my old school stuff I came across my Latin dictionary and with so many Latin words ending in -us I thought that there has to be something fitting that is not already claimed by someone else. Well and there I found it: Plumbeus (/ˈplum.be.us/, [ˈpɫʊm.be.ʊs])
Since I didn't know what I would put on this domain I found that kind of fitting for some meaningless jabber and it was funny to me that many people would have no clue what it stands for. In hindsight the choice might be a bit plump, but I still like the story behind it.