loose cannon

英 美
  • 我行我素的人
  • cannon n.大炮;机关炮v.开炮;相撞
  • loose adj.松的;宽松的;不确切的;不牢固的;放纵的n.解放;放任;放纵v.弄松;释放;放枪adv.松散地
Noun:
  1. a person who is expected to perform a particular task but who is out of control and dangerous