Definition of mouth off in English:

mouth off

phrasal verb

informal
  • 1Talk in an unpleasantly loud and boastful or opinionated way.

    ‘he was mouthing off about society in general’
    • ‘There were loads of lads mouthing off.’
    • ‘She was overheard mouthing off about her rival.’
    • ‘He was mouthing off about something he knows nothing about.’
    • ‘He was just as into the avant-garde, but he was exploring it rather than mouthing off about it.’
    • ‘Nobody shows off or mouths off quite as good as a Leo.’
    • ‘About half of them were prone to not listening to orders and mouthing off.’
    • ‘I'm checking in with her today, and instead of mouthing off on what I think she should do, I'm just going to listen.’
    • ‘There is nothing wrong with people mouthing off on a radio talk show.’
    • ‘I'm sick of her mouthing off about me.’
    • ‘If TV cameras catch him spitting or swearing, you can bet that some retired cop, headmaster or right-wing politician will be mouthing off to the Monday papers about sloppy role models and the decline of civilisation.’
    • ‘He skips school constantly and, on the handful of days he does show up, he's either mouthing off or getting into big-time, black-eye fights.’
    • ‘When he mouths off to a pretty young teacher, he apologizes: ‘I'm sorry I sounded off on you.’’
    • ‘If your father mouths off to you about it, just remind him that he lives in your house and has to respect your rules now.’
    • ‘If a kid mouths off, maybe he doesn't like you or maybe he's seen his mother beaten up by her boyfriend.’
    • ‘Kids learn how to be mature only by mouthing off to any authority figure they can.’
    • ‘Maybe they've had a big boost in fundraising since he started mouthing off so publicly.’
    • ‘He was then booked for mouthing off to the assistant referee.’
    • ‘‘You're always mouthing off about things,’ one of my friends told me the other day as I launched an attack on the cost of school trips these days.’
    • ‘I wondered about how many of them actually think like they purport to rather than simply mouthing off in this obnoxious way simply to wind people up.’
    • ‘My nice neighbours the other side said that she'd been in there, mouthing off about her partner and asking for drink.’
    rant, spout, declaim, rave, jabber, sound off
    View synonyms
    1. 1.1mouth off at Loudly criticize or abuse.
      • ‘He was sent to cool off in the sin bin for mouthing off at the referee.’
      • ‘He was only taken to the station because he mouthed off at a cop.’
      • ‘Then a person came across in a boiler suit and started mouthing off at us.’
      • ‘Never again, did Sean ever mouth off at him.’
      • ‘It was confirmed when you didn't mouth off at me earlier.’
      • ‘She's been like that ever since Lea turned around and started mouthing off at me.’
      • ‘She had had to endure being mouthed off at all her childhood.’
      • ‘When Mr Godfrey started mouthing off at Sergeant Newell, he made us go with him to the station.’
      • ‘Before I get the chance to mouth off at her, she's in my face.’
      • ‘They are often petty offenders - kids who have been caught shoplifting, mouthing off at police, or using drugs a couple of times, for example.’
      • ‘After mouthing off at her, they turned it down a little bit, then a minute later cranked it up even louder than it was originally.’
      • ‘You can't just go mouthing off at people for making simple mistakes.’
      • ‘She immediately got up and began mouthing off at the guy who had knocked me over.’
      • ‘He mouths off at the ref, but can't even get a booking.’
      • ‘Some guy mouths off at him and they begin brawling.’
      • ‘They're busy mouthing off at each other.’
      • ‘He refused to go quietly, mouthing off at the coach as he made his way to the dressing room.’
      • ‘I thought you'd have mouthed off at the guards until they beat you to death.’
      • ‘And so when someone blows up and mouths off at a guard or goes after somebody else about their kids, I totally understand where that emotion and that lightning-fast trigger comes from.’
      • ‘He thought that perhaps it wouldn't be such a smart idea to mouth off at the person holding the gun.’