Will Be a Tough Nut to Crack?

: a person or thing that is difficult to deal with, understand, or influence The team's defense is a tough nut to crack.

Where does the phrase a hard nut to crack come from?

tough nut to crack, a

A difficult problem; a hard person to deal with. This early analogy, also put as a hard nut to crack, was first drawn in the early eighteenth century.

What type of nut is hard to crack?

One nut you have likely never seen in the shell is the macadamia, and for good reason. Unlike opening a peanut or a pistachio, it takes some serious muscle to extract the edible nut from its shell: 300 pounds of pressure per square inch to be exact, making it the hardest nut in the world to crack!