A person who doesn't wear PPE correctly (if at all) and so puts themselves and others at risk of catching COVID-19. Example: Someone who wears their mask under their nose rather than covering their nose and mouth.
Anna: Hey, your mask needs to go over your nose, too. Otherwise you're more likely to breathe germs in or sneeze them out.
Rick: This is a free country! Don't tell me what to do!
Anna: Wow, OK, plague rat.
Rick: This is a free country! Don't tell me what to do!
Anna: Wow, OK, plague rat.
by HeidiHyde December 14, 2020
An item on EverQuest, introduced from the start, that sold for around one platinum per tail. This is the main way for starting players to make money. There is talk of Sony lowering the value of (or "nerfing) the plague rat tail, but this is only a rumor.
by godogames@gmail.com January 02, 2006