睁眼说瞎话

zhēng yǎn shuō xiā huà

(idiom) to lie through one's teeth; to talk drivel

zhēng

to open (one's eyes)

yǎn

eye (CL:隻|只[zhi1],雙|双[shuang1])

shuō

to speak; to talk; to say

xiā

blind

huà

old variant of 話|话[hua4]