clear as mud
一清二楚
口語·表示難以理解或含糊不清
英文釋義
not clear or easy to understand
例句
His explanation of the new policy was clear as mud; I still have no idea what to do.
典故來源
源自20世紀初的幽默反諷，字面意思是“像泥巴一樣清晰”，實際表示完全不清晰，常用于調侃或諷刺。