this is it - definition and synonyms

phrase spoken
  1. 1
    used before an action or event that will have an important effect on the final result

    Then they said, ‘Come on, show us what you can do.’ And I thought, ‘This is it.’

  2. 2
    British used when agreeing with someone, by saying that they have referred to the most important aspect of a situation

    ‘The trouble is, the government won’t listen.’ ‘Well, this is it.’

See also main entry: this