A fork of Rural Dictionary
“The gramma grass referenced by the explorer terminated in a graceful curl, and that “chino” in the Mexican vernacular meant “curly hair,’ hence the name applied to this valley of gramma grass.” According to Why We Celebrate the 1st Territorial Capital Days in Chino” Retrieved Sept. 21, 2009 from the Chino Valley News com
The curly hair in Spanish slang was generally meant to be pubes, and 'chino hills' would be mons pubes in slang.
Hey your chinos are showing in those shorts. Wear them chinos. You want people to see your chino hills?