pol·ka /ˈpolkə, ˈpokə/
  波爾卡舞,女用緊身短上衣
  Pol·ka n.
  1. A dance of Polish origin, but now common everywhere. It is performed by two persons in common time.
  2. Mus. A lively Bohemian or Polish dance tune in 2-4 measure, with the third quaver accented.
  Polka jacket, a kind of knit jacket worn by women.
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  polka
       n 1: music performed for dancing the polka
       2: a Bohemian dance with 3 steps and a hop in fast time