"S.O.B." stands for "Son of a Bitch," a colloquial expression often used to describe someone in a derogatory manner. It can refer to a person perceived as unpleasant, deceitful, or troublesome. The term is commonly used in informal conversations and can convey frustration or anger. In popular culture, "S.O.B." has also been used as a title for various works, including films and songs. For example, the 1981 film S.O.B. directed by Blake Edwards satirizes the film industry. The phrase has become a part of everyday language, reflecting a range of emotions from humor to hostility.