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1.
human manure, shit, crap
Ending a century-old tradition, nightsoil collectors have cleared the last lavatory in Beijing by hand, another milestone in what has been dubbed the toilet revolution sweeping China
by noguide June 13, 2006

Words related to nightsoil

crap defecate manure shit toilet wc
 
2.
"night soil": a phrase meaning to soil ones self with faceal matter from the anus.
"Bad news..........just night soiled myself"
"anyone got some Charmin Double Velvet, I appear to be in the unfortuante position of having night soiled my panties"
by Tom Gummer November 10, 2004