Egregious

Extremely bad

Usage examples -

• Christian Zionism: An Egregious Threat to US and to Middle East Understanding
  Christian Zionism, a belief that paradise for Christians can only be achieved once Jews are in control of the Holy Land, is gathering strength in the United States.
• An egregious abuse of taxpayers' trust.
• Egregious accounting errors.
  

Flash phrase: Egregious error