Definition of bum someone out in US English:

bum someone out


North American
  • Make someone feel annoyed, upset, or disappointed.

    ‘it really bummed me out when he forgot my birthday’
    • ‘I have to say if I was a Rays fan this trade would bum me out.’
    • ‘We wanted coffee, which seemed to bum him out.’
    • ‘The ticket price bummed me out more than the fact he changed dates.’
    • ‘Man, it bums me out that today is our last day together!’
    • ‘But it's really bumming me out and affecting my life in ways I'm not happy with.’
    • ‘Hearing just moments ago that Tony died has REALLY bummed him out.’
    • ‘Powerful women whose insecurities drive them to hate on other powerful women bum me out.’
    • ‘IHe's in a sour mood right now so I hope this doesn't bum him out too badly.’
    • ‘I wish I could say it comforted me, but scrolling past those dozens of kitty obituaries just bummed me out even more.’
    • ‘I've got to tell you something that may bum you out.’
    • ‘You don't like others to control you, so when your parents give you a list of chores, it bums you out!’
    irritate, vex, make angry, make cross, anger, exasperate, irk, gall, pique, put out, displease, get someone's back up, put someone's back up, antagonize, get on someone's nerves, rub up the wrong way, ruffle, ruffle someone's feathers, make someone's hackles rise, raise someone's hackles
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