One of the more better known fake entries is "Lillian Virginia Mountweazel" from the 1975 edition of the New Columbia Encyclopedia. The New Yorker wrote an article about this fake woman. This is what they said about her:
Pretty interesting, huh? These fictitious entries are quite old and have since been adopted in many reference works, such as zzxjoanw (1905) and some of them are quite recent, such as the word esquivalience (2005). It makes you wonder how many fake entries are in the dictionary nowadays.