Definition of pop off in US English:

pop off

phrasal verb

informal
  • 1Die.

    • ‘I just want there to be street parties when he pops off.’
    • ‘Raymond Brown also died recently; all these great guys have all just popped off.’
    • ‘I felt like cheering when she finally popped off.’
  • 2Speak spontaneously and at length, typically angrily.

    ‘I've been thinking about it a lot—I don't want you to imagine I'm just popping off’
    • ‘But what I'm wondering is, is this going to make people at home when they see various pundits popping off on shows say, I wonder who is paying that guy?’
    • ‘If we were just a group of people popping off on policy, I don't think we would do anyone any good.’
    • ‘Don't want to pop off and give your liberal views?’
    • ‘We were letting them pop off, vent, and God knows what they said.’
    • ‘Anyway, they would pop off with full-length reviews of whatever they'd happened to be listening to at the time, be it from the past week or from 20 years earlier.’
    • ‘If the election doesn't go your way, don't pop off as though America were Guatemala under the generals.’
    • ‘Now, you pop off on your blog, among other professional pursuits.’
    • ‘So please, if you care about us, do not post any messages when Mike pops off about me in the future (as you know he will).’
    • ‘Sharpton is the race's ragged edge, its propensity to pop off and speak out of turn; he's the political id that blacks are constantly encouraged to throw away in the spirit of progress and cooperation.’
    • ‘He is giving interviews to one news outlet after another, popping off in various more or less inconsistent directions.’