The standard fandom term for using a real person's name in a story as a form of in-joke or Shout Out. Derived from the science fiction writer Wilson Tucker, well known for doing this.
It isn't always a famous person, either: sometimes a writer will use the names of friends (or enemies). Famous writers, including Stephen King and Terry Pratchett, have been known to offer their readers a chance to [...] [tvtropes.org]