Definition of you couldn't make it up in English:

you couldn't make it up

phrase

British
  • Said in reference to something too astonishing to be believed.

    ‘it is so ridiculous, you couldn't make it up’
    • ‘There is, of course, no lack of bad news around - war looming, jobs lost, the stock market crashing, you couldn't make it up.’
    • ‘She was wearing a black curly wig tied under her chin with a black shoelace; honestly, you couldn't make it up and we couldn't work for laughing.’
    • ‘At this rate, more people will have taken my quiz in the next week than have visited my website in the past year: you couldn't make it up, really.’
    • ‘A former jailbird playing Churchill? You couldn't make it up, could you?’
    • ‘This is so stupid you couldn't make it up.’