"You canker blossom!" 3 Shakespearean Insults
mid-15c., from Latin rusticus "of the country, rural; country-like, plain, simple, rough, coarse, awkward," from rus (genitive ruris) "open land, country" (see rural). Noun meaning "a country person, peasant" is from 1550s (also in classical Latin). Related: Rustical (early 15c.).