1. 廉价的;俗气的
If you describe something such as clothes or decorations as tawdry, you mean that they are cheap and show a lack of taste.

2. (故事、事件)令人讨厌的，卑鄙的，不道德的
If you describe something such as a story or an event as tawdry, you mean that it is unpleasant or immoral.