Manga Reference Joke Pins & Buttons. "80% of what I say is just a manga reference" on cool manga reference joke pins & buttons for Japanese manga geeks! Buy the funny manga reference joke "80% of what I say is just a manga reference" on these great pins, buttons and mini buttons today in your choice of square or round. A fun gift for the manga fan who always quotes their favorite shows, it'll go perfectly with a "80% of what I say is just a manga reference" tee or hoodie as a birthday gift they’ll love! Check out the bulk discount pricing too; when you buy in bulk, you save!