insomniac
  不眠症患者
  in·som·ni·ac /-nɪˌæk/ 名詞
  失眠症患者
  insomniac
       adj : experiencing or accompanied by sleeplessness; "insomniac old
             people"; "insomniac nights"; "lay sleepless all night";
             "twenty watchful, weary, tedious nights"- Shakespeare
             [syn: sleepless, watchful]
       n : someone who cannot sleep [syn: sleepless person]