From Wiktionary, the free dictionary
Literally, “to have shit in the eyes”; compare English have shit for brains for a similar image.
- IPA(key): /a.vwaʁ də la mɛʁ.d(ə) dɑ̃ le.z‿jø/
avoir de la merde dans les yeux
- (vulgar) to be fucking blind, to not notice the obvious