1.Joe Public/BloggsBritish EnglishBrE, Joe Blow/Schmo American EnglishORDINARY spoken the ordinaryaverage person 普通人,平常人
Examples from the Corpus
Joe Public/Bloggs• You can't go into the recording studio and be Joe Bloggs.• But Joe Public will feel aggrieved our No.1 sport is not available to everyone.• We're giving away 15 great cottonsweatshirts from Joe Bloggs in variousautumnal colours - one sizefits all.• She also aims to help Joe Public get rid of those nigglingaches and pains.
2.Joe College/Citizen etcAmerican EnglishAmE spoken someone who is a typicalexample of people in a particular situation or involved in a particular activity 典型的大学生/公民等