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Noun: smart-arse  'smaa(r)t,aa(r)s
Usage: Brit, Cdn, informal (US: smart-ass)
  1. Someone being or trying to be irritatingly clever; a smart alec
    "The teacher grew tired of the smart-arse always correcting her";
    - bright spark [informal], smart-ass [N. Amer, informal], smarty-boots [Brit, informal], smartypants [informal], smarty [informal], smartie [informal]

Derived forms: smart-arses

See also: clever clogs [Brit, informal], clever Dick [Brit, informal], smart alec [informal], smart aleck [informal], weisenheimer [US, informal], wiseacre, wisenheimer [US, informal]