Generally, if a statement implies defamatory facts about a person's reputation as the basis of the opinion, then the statement may be considered a libelous or slanderous statement.

What makes a statement libelous?

Libel is the publication of writing, pictures, cartoons, or any other medium that expose a person to public hatred, shame, disgrace, or ridicule, or induce an ill opinion of a person, and are not true. ... In short, libel is publication of false information about a person that causes injury to that person's reputation.

What is considered libelous?

Definition. Libel is a method of defamation expressed by print, writing, pictures, signs, effigies, or any communication embodied in physical form that is injurious to a person's reputation, exposes a person to public hatred, contempt or ridicule, or injures a person in his/her business or profession.