noun (n)

• anything characterized by abrupt and extreme changes (especially up and down)

  apapun ditandai oleh perubahan mendadak dan ekstrim (terutama atas dan ke bawah)

  Example:
  The economy has been on a roller coaster all year.
  

  source: wordnet30
• elevated railway in an amusement park (usually with sharp curves and steep inclines)

  kereta api ditinggikan di sebuah taman hiburan (biasanya dengan tajam dan curam inclines lengkung)

  Synonym:
  big dipper, chute-the-chute
  

  source: wordnet30