padder

/ˈpædər/
noun
  1. A person or thing that pads something, such as adding soft material or unnecessary content.
    • The machine acted as a padder, layering cotton between the fabric sheets.
    • As a writer, he was known as a padder who filled pages with fluff.
    • The factory worker was a padder, inserting foam into the furniture cushions.
Synonyms