Definition of be the best (or greatest) thing since sliced bread in English:

be the best (or greatest) thing since sliced bread

phrase

informal
  • Be very good:

    ‘they think that she is the greatest thing since sliced bread’
    • ‘That's not to say there isn't a market there, rather that we haven't been convinced it's quite the next best thing since sliced bread.’
    • ‘Some people are a little confused by this latest trend, wondering what all the fuss is about and why it's becoming the next best thing since sliced bread.’
    • ‘She finally locates the Assistant Wine Whatever-His-Title-Is, and he of the broad-smile-on-a-wide-face recommends the wine as if it were the next best thing since sliced bread.’
    • ‘While some analysts think it's the next best thing since sliced bread, it has the feeling of WAP redux.’
    • ‘Just because almost everyone thinks the group is the next best thing since sliced bread doesn't mean that it won't fall apart.’