冷笑 [ㄌㄥˇ ㄒㄧㄠˋ; leng3 xiao4]
  to sneer
  to laugh grimly
  grin of dissatisfaction (bitterness, helplessness, indignation etc)
  bitter, grim, sarcastic or angry smile
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  冷笑
  れいしょう
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  derision
  derisive laughter
  scornful laugh
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