The manifestations of negative online public opinion can be expressed in various forms. These include but are not limited to:

Negative comments and criticisms: This involves individuals or groups expressing dissatisfaction, anger, or dislike towards a particular person, event, or issue on online platforms. These comments can be highly critical and sometimes even defamatory.

Rumors and misinformation: The spread of false or misleading information can create a negative perception of a person, brand, or event. This can be intentional, in order to damage someone's reputation, or unintentional, due to the misinterpretation or misreporting of information.

Hate speech and cyberbullying: These are forms of online harassment that involve the use of offensive, insulting, or threatening language towards a specific individual or group. Hate speech often targets people based on their race, gender, sexuality, religion, or other personal characteristics.

Negative reviews and ratings: Online reviews and ratings can have a significant impact on a person or business's reputation. Negative reviews, especially if they are numerous or prominent, can create a negative perception that is difficult to overcome.

Memes and sarcastic remarks: These are often used to mock or ridicule a person or event in a humorous or sarcastic manner. While they may seem harmless at first, they can contribute to a negative online image or sentiment if they are widely shared or repeated.

Overall, negative online public opinion can take many forms, and its impact can range from minor to significant, depending on the context and scale of the issue.