sharpen one’s spear just before going into battle—start to prepare at the last moment
临阵磨枪
sharpen one’s spear only before going into battle;start to prepare at the last moment;take action in great haste
临阵磨枪lín zhèn mó qiānɡ
枪:古代指梭镖之类的兵器。到了上战场打仗时才去磨枪。比喻事到临头,才做准备。start to prepare only at the last moment, sharpen one’s spear just before a battle