double whammy

/D AH1 B AH0 L W AE0 M IY0/
noun
  1. 1

    A twofold blow or setback; a series of two events that cause adverse effects

  2. 2

    (by extension) a twofold boon; a series of two events that cause positive effects

Source: https://en.wiktionary.org/wiki/double%20whammy