Is it grammatically correct to say “they deserves the worse or they deserves the worst” What does it mean? Can it be rephrased?

The correct phrase is "they deserve the worst." The word "deserve" should be used in the base form "deserve" rather than "deserves," which is used with third-person singular subjects like "he," "she," or "it." The phrase "they deserve the worst" implies that the individuals in question are entitled to receive the worst possible outcome or treatment, often as a form of punishment or consequence for their actions. You could rephrase it in several ways, such as: - "They have earned the worst." - "They are worthy of the worst." - "They should receive the worst." All these alternatives convey a similar meaning.