Origin of the slang "機車" I know that "機車" is motorcycle and it is also used as a slang word, but I was unsure of its meaning. Thus, i checked this page, and I was confused by its ambiguity when translated to English, as listed below:


  
  indecisive
  temperamental
  fickle/flaky/capricious
  stubborn
  demanding
  jerk
  


Is jerk the English equivalent of "機車"? If not, is there an English equivalent? What was the origin of this slang meaning? I cannot find any correlation between "motorcycle" and any of the meanings listed...

Thanks in advance!
It's a Taiwanese slang.


  機車：在台灣有時會用來形容人難以相處，作為一種罵人用語。由來為台灣閩南人中，部分人士對於令人不滿
      的人會以粗俗詞語「欠姦」（閩南話）來形容，甚至以「膣屄」（閩南話，發音類似「機掰」）取代「欠姦」，
      但由於感到不雅或故意作為玩笑，起於民國80年代的學生族群，有一些人「機……」第一個音發出後，第二個
      音改接「車」而成為「機車」。


ref : wikipedia of 機車