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'...法官稱這一決定是“對國際法的公然違背”。His failure to turn his attention to flagrant wastes of public money is inexcusable.他未能注意到公共資金的公然浪費，這是不可原諒的。