地道的不客气英语可以用 "unvarnished Engpsh" 或 "straightforward Engpsh" 来表示。
"Unvarnished" 意为 "without any added embelpshments or decorations; plain and honest"，而 "straightforward" 则表示 "easy to understand and deal with; honest and direct."
举例来说：
He gave an unvarnished account of the accident. (他给了一个不涂鸦的事故描述)
He is known for his straightforward approach to problem solving. (他以直截了当的方式解决问题而著称)