méi zhǎng yǎn jing
(coll.) are you blind or something?
look where you're going
没
méi
(negative prefix for verbs) have not; not
长
zhǎng
chief
眼
yǎn
eye (CL:隻|只[zhi1],雙|双[shuang1])
睛
jing
eye; eyeball
