馬鹿も休み休み言え
Meanings
1
stop talking nonsense; don't be ridiculous; give me a break
A set phrase used to sharply tell someone they are speaking foolishly. Often carries a tone of exasperation or contempt. The literal meaning is 'even a fool should rest before speaking', implying that the listener's words are so absurd they should take a break from talking.
There's no way that plan will succeed. Stop talking nonsense.
Saying you're the best? Give me a break.