pos·sum /ˈpɑsəm/
 負鼠(vi.)裝死
 Pos·sum n.  Zool. An opossum. [Colloq. U. S.]
 To play possum, To act possum, to feign ignorance, indifference or inattention, with the intent to deceive; to dissemble; -- in allusion to the habit of the opossum, which feigns death when attacked or alarmed.
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 possum
      n 1: nocturnal arboreal marsupial having a naked prehensile tail
           found from southern North America to northern South
           America [syn: opossum]
      2: small furry Australian arboreal marsupials having long
         usually prehensile tails [syn: phalanger, opossum]