CEDICT
遲鈍、愚笨。《晉書．卷五一．皇甫謐傳》：「豈我居不卜鄰，教有所闕，何爾魯鈍之甚也！」也作「鹵鈍」。
重編國語辭典
A foolish head makes for weary feet.
When you don't have brains, your feet get no rest.
Source: Tatoeba