The Vietnamese word "lỗ mãng" is an adjective that means "coarse," "rude," or "abusive." It describes actions or behaviors that are disrespectful, impolite, or lacking in consideration for others.
Hành động lỗ mãng - A rude action.
Câu nói lỗ mãng - A rude statement.
To summarize, "lỗ mãng" is a useful word for describing rude or disrespectful behaviors in Vietnamese.