English version

tough/hard nut

From Longman Dictionary of Contemporary Englishtough/hard nuttough/hard nutinformalDIFFICULT someone who is difficult to deal with He may have softened a bit in his old age but he’s still a tough nut. nut
Examples from the Corpus
tough/hard nutWest Ham will be a tough nut to crack especially with big Lee in good form at the moment.Already highly successful in popular music, dance and commercial television, blacks have found the movies a tougher nut to crack.Shearer, a tough nut not inclined to whinge, said his ankle was like a pudding.Beverley was a tougher nut to crack.Tax will be an even tougher nut.One glance was all it took to realise this was one hard nut to crack - his features still completely impassive.Back, now, to the hard nuts.
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