What is a writing worm? A bookworm who’s caught the writing bug. If you adore the stories in books and will read through snow or rain or heat or gloom, then you are a bookworm. If you love crafting worlds with the English language and will write through snow or rain or heat or gloom, then you are a writer. If you love all of these things (and chances are that you do), then you are a writing worm!