vulgar adj. that is in common or ordinary use XIV (rare before XVI); ordinary, common, commonplace XVI; lacking in refinement XVII; sb. †the vernacular XV; †(chiefly pl.) common or vulgar person XVI. — L. vulgāris, f. vulgus, volgus the common people; see -AR.
So vulgarity †common people XVI; †common use, quality, etc. XVII; vulgar character XVIII. — late L. vulgarize †be vulgar XVII; make vulgar XVIII. Vulgate in common use as a version of the Bible (spec. the Latin of St. Jerome completed in about 405 A.D.) XVII; sb. the Vulgate Bible XVIII; received text of the Bible; (v-) ordinary reading in a text XIX. — late L. vulgātus, pp. of L. vulgāre make public or common, f. vulgus; see -ATE2. Hence vulgarism †ordinary expression XVII (rare); vulgar expression, quality, etc. XVIII. vulgarize †be vulgar XVII; make vulgar XVIII.

VULGAR. A nontechnical term that has moved from a neutral and general to a pejorative meaning. Formerly, it referred to ordinary life and ordinary people, as opposed to an upper-class or educated minority. Vulgar Latin was the everyday Latin of the Roman Empire and, until the 19c, European VERNACULAR languages were referred to as vulgar tongues. Concomitantly, a sense of coarseness and lack of breeding and culture developed, associated with the ‘lowest orders’ of society, and now dominates, particularly with reference to language: a vulgar remark. See PARTRIDGE, RECEIVED STANDARD AND MODIFIED STANDARD, SWEARING.

vul·gar / ˈvəlgər/ • adj. lacking sophistication or good taste; unrefined: the vulgar trappings of wealth. ∎  making explicit and offensive reference to sex or bodily functions; coarse and rude: a vulgar joke. ∎ dated characteristic of or belonging to the masses. DERIVATIVES: vul·gar·i·ty / ˌvəlˈgaritē/ n. (pl. -ties) vul·gar·ly adv.

Vulgar Latin, vernacular form of the Latin language spoken in ancient Rome and the Roman Empire, as distinguished from classical or literary Latin. Vulgar Latin, rather than classical Latin, is the true parent of the individual Romance languages.

vulgar Latin informal Latin of classical times; vulgar in this sense means ‘in ordinary use, used by the people’, and comes ultimately from vulgus ‘common people’.

vulgar •dogger, flogger, Hoggar, hogger, jogger, logger, slogger, Wagga Wagga •brolga, Olga, Volga •conga, conger, donga, Rarotonga •pettifogger • footslogger •cataloguer (US cataloger) •auger, augur •ogre, Saratoga, toga, yoga •beluga, cougar, Kaluga, Kruger, Luger •sugar, Zeebrugge •bugger, hugger, lugger, mugger, plugger, rugger, slugger, Srinagar, tugger •mulga, vulgar •hunger, sangha, Younger •scandalmonger • scaremonger •fishmonger •warmonger, whoremonger •ironmonger • hugger-mugger •costermonger • Málaga •Berger, burger, burgher •hamburger • beefburger •cheeseburger • Limburger •Vegeburger • Erzgebirge •Luxembourger