Definition of go (or be) under the knife in English:

go (or be) under the knife

phrase

informal
  • Have surgery.

    • ‘Some women opt for plastic surgery and liposuction, but other women who don't want to go under the knife are now trying to combat cellulite with another option called mesotherapy.’
    • ‘Anyone planning to go under the knife to improve their looks should heed a warning from the nation's leading plastic surgeons: the camera does lie.’
    • ‘For those who don't want to go under the knife there are a host of other options on offer, and many women simply don't mind splashing out to keep their looks.’
    • ‘He felt then that the best solution was to go under the knife.’
    • ‘The 48-year-old says she would never go under the knife and is sickened by the pressure Hollywood actresses are put under to stay looking young’
    • ‘A MAN whose vital heart surgery has been cancelled TEN times due to bed shortages at York Hospital was today due to go under the knife.’
    • ‘While women still account for nearly 90 per cent of all plastic surgery patients in the United States, men are increasingly going under the knife.’
    • ‘So here's my advice: If a doctor says you need back surgery, get several other opinions before going under the knife.’
    • ‘I couldn't contemplate going under the knife to erase my wrinkles, it would be like wiping out a part of my past.’
    • ‘The talented young back has been struggling with a persistent groin problem and after three months of intensive physio, he could now be set to go under the knife to finally rectify the injury.’