swipper

from The Collaborative International Dictionary of English v.0.48

Swipper \Swip"per\, a. [From AS. swipian to whip, shake, whirl;
   akin to sw[=a]pan to sweep. See {Swoop}.]
   Nimble; quick. [Obs. or Prov. Eng. & Slang]
   [1913 Webster]