虎視眈眈 [ㄏㄨˇ ㄕˋ ㄉㄢ ㄉㄢ; hu3 shi4 dan1 dan1]
  to glare like a tiger watching his prey (idiom)
  to eye covetously
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  虎視眈々
  虎視眈眈
  こしたんたん
  adverb taking the `to' particle
  `taru' adjective
  (watching) vigilantly for an opportunity to prey upon
  with an eagle eye
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