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》