The phrase "have all oneself" means to have complete control or possession over something or someone without any interference from others. Some synonyms for this phrase are "have to oneself", "have in one's possession", "have exclusive rights to", "dominate", "monopolize", "control", and "own outright". These synonyms are used in various contexts, including relationships, business, and personal possessions. For instance, a businessman may have exclusive rights to a particular market, while a person may have control over their emotions and thoughts. In general, the phrase "have all oneself" is used to describe a situation in which someone has complete authority, power, or ownership over something or someone.