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] 十分紧急,如同火烧眉毛

我如今不知便罢,既是天教我知了,正是度日如年,燃眉之急!——《水浒传》