骑脖子拉屎

qí bó zi lā shǐ

lit. to take a dump while riding on sb's shoulders (saying)

fig. to treat sb like garbage

骑

qí

to sit astride

脖

bó

neck

子

zi

noun suffix, as in 椅子[yi3 zi5] "chair"

拉

lā

to pull

屎

shǐ

feces; excrement; a stool