vulgar

Someone who's vulgar has bad taste, and could also be called unrefined or unsophisticated. Your snobby neighbor might mutter about your family's vulgar taste if you paint your house with rainbow stripes.

From the Latin vulgus, meaning "the common people," vulgar is an adjective that can describe anything from the sexually explicit to the merely ugly and crass. Many people believe that there's an important difference between things that are sexually frank and things that are vulgar. "Erotica" can be beautiful and even highbrow, while "pornography" is crude and vulgar. My friend Arnie loves the lights and glamour of Times Square, while Cintra finds all the bright-colored, corporate logos to be vulgar.

Definitions of vulgar
1

adj of or associated with the great masses of people

“a vulgar and objectionable person”
Synonyms:
common, plebeian, unwashed
lowborn
of humble birth or origins

adj being or characteristic of or appropriate to everyday language

“the vulgar tongue of the masses”
“the technical and vulgar names for an animal species”
Synonyms:
common, vernacular
informal
used of spoken and written language

adj lacking refinement or cultivation or taste

“appealing to the vulgar taste for violence”
“the vulgar display of the newly rich”
Synonyms:
coarse, common, rough-cut, uncouth
unrefined
(used of persons and their behavior) not refined; uncouth

adj conspicuously and tastelessly indecent

“a vulgar gesture”
“full of language so vulgar it should have been edited”
Synonyms:
crude, earthy, gross
indecent
offensive to good taste especially in sexual matters