trivialist

plural trivialists

1. human sciencesA proponent of trivialism, the metaphysical and logical theory that all propositions are true.
2. rareOne who is interested in trivia or trivialities; one who is familiar with the small details of a particular subject.

   There were many groups that flourished during the fifties, and rock trivialists love outdoing each other by naming the most obscure songs, groups, and labels they can think of.

   2008, David Lee Joyner, American Popular Music, 3rd edition, McGraw-Hill Education, →ISBN, page 191

   1 more example

   Walter was a very friendly man and a very intelligent man. He was a good conversationalist and a trivialist. His pockets were stuffed with different trivia that he liked to test the rangers with.

   2012, David J. Suvak, A Test Drive to Chicago: And Other Trips and Tales, Xlibris Corporation, →ISBN, page 158