harebrained /ˈhɛəˌbreɪnd/ (also hare-brained) TEM8

• 1. 

  ADJ You use harebrained to describe a scheme or theory which you consider to be very foolish and which you think is unlikely to be successful or true. (计划、理论等)愚蠢的; 不可行的 [usu ADJ n] [表不满]

  例：

  This isn't the first harebrained scheme he's had.

  这已经不是他制定的第一个愚蠢计划了。