The obvious and often offensive displays of hacking, spitting, nostril-clearing and public defecation/urination common to the city of Shanghai.
Also encapsulates the greasy dishes, sticky tables, and public toilets that look like they're from a Stephen King novel.
"Did you see that woman hold her baby over the trash can so it could take a shit? 'S some mad Shanghygiene."
"Yup. Very Shanghygienic."