Definition of tell someone where to get off (or where they get off) in US English:

tell someone where to get off (or where they get off)

phrase

informal
  • Angrily dismiss or rebuke someone.

    • ‘At 21, if I approached a 40-year-old hard-nut comedian to play my new little comedy club in York, they'd probably tell me where to get off!’
    • ‘She was just about to tell him where to get off (once again) when something rather peculiar caught her eyes.’
    • ‘He'd tell her where to get off, said a defiant voice.’
    • ‘If he tried that with me now, I'd tell him where to get off.’
    • ‘He must be a real softie and too shy to tell her where to get off!’
    • ‘So if they ask my company to pay a license fee, I'll be recommending that we tell them where to get off.’
    • ‘But I told him where to get off and he hasn't spoken to me since.’
    • ‘Yeah I would have told him where to get off after he acted like a jerk about the evidence you mentioned.’