"Refined taste" refers to a sophisticated and polished sense of appreciation for the finer things in life, such as art, food, and culture. The antonyms for "refined taste" would be words such as unpolished, unrefined, basic, or unsophisticated. These words describe a lack of refinement and taste, often associated with a lack of exposure or education in the subject matter. While one person may appreciate the subtle nuances in a fine wine, another may prefer a cheap, mass-produced brand. It is all a matter of taste, but those who lack a refined palate are likely to miss out on the more subtle and complex flavors of life.