Definition
Effrontery is brazen impudence or shameless audacity. It's a behavior that is so bold and disrespectful that it's shocking. Think of it as 'extreme cheekiness' or 'unbelievable rudeness.' It goes beyond mere impoliteness; it's an outright offense to social norms. It's like showing up to a formal event in pajamas. It conveys a complete disregard for propriety or respect. Essentially it is a combination of audacity, presumptuousness, and a dash of arrogance.