Definition of smart-arse in English:

smart-arse

(US smart-ass)

noun

informal
  • A person who is irritating because they behave as if they know everything.

    • ‘I am the smart-ass who makes the most sucky decisions and was even beaming satisfied, not realising my foolishness.’
    • ‘C'mon, wasn't Martin just being a smart-ass - a type of behavior with which you're familiar?’
    • ‘Even the smart-ass Jacobean wordplay of Sebastian and Antonio - often cut in less adventurous productions - is given a chance by Antony Byrne and Nicholas Day respectively.’
    • ‘In fact any designer hates those dumb smart-asses who have no idea of art but believe they have the best design sense in the world.’
    • ‘Jesse Hooker, an apprentice with the company who had to come in at the last moment, was splendid as Justin, the smart-ass young raisonneur.’
    • ‘Leeds has done him a world of good, and the smart-ass kid I remember now has a smart head on his shoulders; he can read a game so well.’
    • ‘The ride to the Chateau was like a crash-course in Middle-earth catch phrases, as a bus full of J.R.R. Tolkien smart-asses tried to out-do each other by speaking in that elf language.’
    • ‘The difference, of course, is that Kristof gets paid to be a smart-ass in public.’
    • ‘And since I tripped on a curb the other night and then fell down in a comedic way, I have no problem seeing those smart-asses taken down a peg.’
    • ‘‘Don't have so much fun,’ the smart-ass in me said.’
    • ‘I'm not a smart-arse who thinks he knows all the answers now, far from it.’
    • ‘Cutting, heavily ironic comedy and musical numbers ensue, best appreciated for their dazzling cleverness, not for their smart-ass, apathetic politics.’
    • ‘You could call Lee a smart-ass but he is too clever for that.’
    • ‘‘What then after they register,’ asks a smart-ass at the back.’
    • ‘When I was a kid, there was a smart-ass remark we used to make to people who were blocking our view: You make a better door than a window.’
    • ‘Though he may be a skateboarder and a dedicated photographer who's luckily avoided going to some over-priced art school, most of all the guy's a smart-ass who's got a wicked sense of humor.’
    • ‘I can't stand listening to those politico smart-asses with their machine-gun delivery of sleep-inducing minutiae of political maneuvering.’
    • ‘I've been told I can be quite the smart-ass at times, so all I really need to do is refocus on the hard part.’
    • ‘It's like a comedy show all day, every day, with five smart-asses.’
    • ‘And by those smart-arses who have already read the book and go around saying: ‘I know what happens, but I'm not going to tell you.’’

adjective

informal
  • Irritatingly clever or smug:

    ‘I'm sick of his smart-arse comments’

Pronunciation:

smart-arse

/ˈsmɑːtɑːs/