If you describe a politician or an artist as populist, you mean that they claim to care about the interests and opinions of ordinary people rather than those of a small group.
例句
...Jose Sarney, the current populist president...若泽·萨尔内，现任平民主义总统The city of Memphis is promoting a populist approach to culture.孟菲斯市在推行文化的民粹主义道路。