To hit the nail on the head

To hit the nail on the head.
 to hit a bull´s eye, to hit the mark, to hit it right on the button.






       


 E.g. I made a bet with a friend, and I hit the nail on the head. (acertei em cheio / na mosca).

Beats me

Beats me!

interj. I have no idea, I don't know, I haven't got a clue, it's beyond my knowledge or understanding. 

 


E.g. A: What does "noche" mean?
        B: Beats me! (Sei lá!)