LOL
Its actually Old Irish, a form of Gaelic. Its from the movie “Excalibur” back in the early 1980’s, a favorite movie of mine. The words translated means “Serpents breath, charm of life and death, thy omen of making”. So in this sense Anailnathrac means breath of the snake or serpent which could also mean dragon depending on how you translate it.
Its a tag line I used for years after first actually posting at FR instead of Lurking.
As for your tag line, when you post something next time, look just under the Reply Window. That is the the tagline space and likely at some point you accidentally just hit tab and a period to end a sentence and the period ended up in your tag line.
Rather than.. than.. uh.. rather than what is is now?