One of the mysteries of the English language finally explained.
A difficult problem or an opponent that is hard to beat.
- ‘He should prove a tough nut to crack over tomorrow's extended three miles.’
- ‘Japan has proved a tough nut for Microsoft's console division to crack.’
- ‘Nine-year-olds are tough nuts to crack, as Peter Loraine, head of marketing at S Club Juniors' label Polydor, points out.’
- ‘Upgrading a module that combines PHP with SQL is a tougher nut to crack, and it seems as though the XOOPS people have done an admirable job.’
- ‘But he's right about parents being a tougher nut to crack.’
- ‘But reforming the media through policy changes may be the toughest nut to crack in the entire U.S. political system.’
- ‘I'm sure BB would like to implement something that works well for everyone, but it's a very difficult nut to crack and not something to rush into.’
- ‘Oliver Cromwell ordered the walls to be ‘slighted’ - pulled down in parts so that if hostilities broke out again it would not prove so tough a nut to crack.’
- ‘Now they, like the rest of Europe, are tough nuts to crack.’
- ‘‘Entertainment is a really, really difficult nut to crack,’ admits Bolland.’
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