\Lar"ri*kin\, n. [Cf. E. dial. larrikin a mischievous
or frolicsome youth, larrick lively, careless, larack to
trolic, to romp.]
A rowdy street loafer; a rowdyish or noisy ill-bred fellow;
-- variously applied, as to a street blackguard, a street
Arab, a youth given to horse-play, etc. [Australia & Eng.] --
a. Rowdy; rough; disorderly. [Australia & Eng.]
      Mobs of unruly larrikins.                --Sydney Daily
                                               Telegraph.
Note: Larrikin is often popularly explained by the following
      anecdote (which is without foundation): An Irish
      policeman at Melbourne, on bringing a notorious rough
      into court, was asked by the magistrate what the
      prisoner had been doing, and replied, ``He was
      a-larrikin' [i. e., a-larking] about the streets.''