Definition (智慧)
To be intelligent and not easily tricked or deceived.
不是省油的燈
He didn't agree to the deal right away, he's no fool.
他沒有立刻同意這筆交易，他可不是傻子。
Don't try to take advantage of her, she's no fool.
別想佔她便宜，她可不是好騙的。
He knows what he's doing; he's no fool.
他知道自己在做什麼；他可不是傻子。