The idioms used to describe a bad novel are usually those that describe absurdity, strangeness, unrealistic, or vulgar content, such as: 1. Parallel goods: refers to goods that have not been officially registered and are unreliable and of poor quality. 2. Trash: It refers to waste items that are worthless. 3. Brainless: It refers to people with low IQ who do things without thinking. 4. Brain failure: It means that the decision made by a person with a problem in their head is very stupid. 5. Brainless fans: refers to people who worship a star or idol. Their fanatical behavior is often incomprehensible. 6. Brainless drama: It refers to those extremely brainless films and television works that often have absurd plots and characters. 7. Stupid comics: Comics with stupid content often draw strange, funny, and meaningless scenes and characters. 8 Idiot sayings: The classic sayings of those brainless people are often illogical and do not match the words. 9. Brainless games: Games with brainless content often have absurd scenes and characters that people can't understand. These idioms can be used to describe a bad novel that is absurd, unrealistic, and vulgar.