twardy orzech do zgryzienia*

* a hard nut to bite

Polish Poland

Idiom USED Frequently BY Almost Everyone

An expression used to say that something's not easy, hard to solve or to understand

"Jego choroba to twardy orzech do zgryzienia. Nie wiem, co mu jest."

"His disease is a hard nut to bite. I don't know what's wrong with him."

Confirmed by 3 people