adjective
vulgar
VUL-gur/ˈvʌlɡər/
Lacking refinement or good taste.
The guest's vulgar belching draws disapproving looks at the formal dinner.
Etymology
The pieces mean “pertaining to the common people.” The modern sense of crudeness probably developed from applying the word to ordinary social classes, turning a social description into a judgment of manners or taste.
In context
and were seated in the drawing room among the forbidding black jackabian furniture. We will make a certain allowance for bride nerves, but do not ever be so unmadenly, so vulgar as to subject us to another similar outburst.