燃眉之急　

◎ 燃眉之急 ránméizhījí

[as pressing as a fire singeing one‘s eyebrows——a matter of extreme urgency;be urgently critical;immediate danger;pressing need] 十分緊急,如同火燒眉毛

我如今不知便罷,既是天教我知了,正是度日如年,燃眉之急!——《水滸傳》