Definition of smarty in English:

smarty

noun

informal
  • 1A know-all.

    • ‘What I said was ‘I hadn't heard about one of them ’, but I presume some subeditor was being a smarty and thought my grammar was bad and that I meant ‘I hadn't heard about any of them’.’
    • ‘She is a smarty, answers back to me (especially when her father is not around) and is exceptionally wilful.’
    • ‘He is too brash, too much of a smarty, for some of his colleagues.’
  • 2dated A smart or fashionable person.

Pronunciation:

smarty

/ˈsmɑːti/