Economic Tsunami
  
An economic tsunami splashes around a whole lot of water...in a metaphorical sense. An economic tsunami refers to one, single event that caused a whole lot of economic problems everywhere else.
Which makes sense, right? Think about how interconnected we are globally, and how specialized businesses are, which makes them dependent on each other. A winter storm might prevent an avocado shipment to the US, which would lead to a shortage in avocados, which would mean millennials would be able to afford houses again.
Eh, okay. Millennials aren’t broke because they spend all of their money on avocado toast, and economic tsunamis aren’t describing positive effects. Rather, an economic tsunami is an event that caused widespread economic problems, potentially across an industry, multiple industries, or a geographic area. The more interconnected we are economically, the more affected we will all be when someone royally messes up (looking at you, all the players causing the 2008 financial crisis).