pres·to /ˈprɛs(ˌ)to/
  (v.)趕快;快[變戲法用語]
  Pres·to adv.
  1. Quickly; immediately; in haste; suddenly.
     Presto! begone! 'tis here again.   --Swift.
  2. Mus. Quickly; rapidly; -- a direction for a quick, lively movement or performance; quicker than allegro, or any rate of time except prestissimo.
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  presto
       adj : (of tempo) very fast
       adv 1: suddenly; "Presto! begone! 'tis here again"- Swift
       2: at a very fast tempo (faster than allegro)