If you describe something as vulgar, you think it is in bad taste or of poor artistic quality.
I think it's a very vulgar house.
我认为这栋房子很俗气。
If you describe pictures, gestures, or remarks as vulgar, you dislike them because they refer to sex or parts of the body in an offensive way that you find unpleasant.
The women laughed coarsely at the comedian's vulgar jokes.
那些女人们听到滑稽演员的下流笑话后都放荡地大笑起来。
If you describe a person or their behaviour as vulgar, you mean that they lack taste or behave offensively.
He was a vulgar old man, but he never swore in front of a woman.
他是个粗鲁的老头,但他从来没有在女人面前说过脏话。