两眼一摸黑

liǎng yǎn yī mō hēi

(of sb in an unfamiliar situation) helpless and disoriented

liǎng

two

yǎn

eye (CL:隻|只[zhi1],雙|双[shuang1])

one

to feel with the hand

hēi

abbr. for Heilongjiang province 黑龍江|黑龙江[Hei1 long2 jiang1]