n (Australia|metonym|informal|dated) A jockey; from a common pattern on the blouse.“[http://books.google.com.au/books?id=B7tZAAAAMAAJ&q=%22hoop%22|%22hoops%22+australia+OR+jockey+-intitle:%22%22+-inauthor:%22%22&dq=%22hoop%22|%22hoops%22+australia+OR+jockey+-intitle:%22%22+-inauthor:%22%22&hl=en&sa=X&ei=80yET8v1AsvumAWsn4HjBw&redir_esc=y hoop]”, entry in '1989', Joan Hughes, Australian Words and Their Origins, page 261.