Tom yum is a Thai soup with shrimp and a broth that features salty, sour, sweet, and spicy flavors. “Tom” translates to “boiled” and “yum” translates to “medley,” which refers to the soup’s dressing. Yes, this soup has a dressing. Thai salads are called yum, and yum vinaigrette is made up of fish sauce, lime juice, palm sugar, and chilies. Add boiling hot broth to it and you’ve got tom yum, or “salad soup.”