You can use flagrant to describe an action, situation, or someone's behaviour that you find extremely bad or shocking in a very obvious way.
例句
The judge called the decision 'a flagrant violation of international law'...法官称这一决定是“对国际法的公然违背”。His failure to turn his attention to flagrant wastes of public money is inexcusable.他未能注意到公共资金的公然浪费，这是不可原谅的。