ghoster

noun4

1. •
   (slang) One who ghosts or ignores another person.
2. •
   (slang) A ghosthunter; a paranormal investigator.

   • Ghosters in hopes of catching proof of the paranormal came out of hiding. They emerged from behind headstones, crawled out of bushes, and peered around large trees. — 2015
3. •
   A very lightweight headsail.
4. •
   A vessel that sails seemingly without wind.