* "Her crazy one": This could be used to refer to someone who is considered crazy or eccentric by the person being discussed.
* "Her madness": This could refer to a specific instance of craziness or a general state of mental instability.
* "Her lover": In some contexts, "loca" can be used as a slang term for "lover," so "su loca" could mean "her lover." This is less common but possible.
It's important to consider the context in which the phrase is used to determine the most accurate meaning. For example, if someone says "Su loca está muy mal," it likely means "Her crazy one is very sick." However, if someone says "Su loca es una artista," it could mean "Her lover is an artist."
It's also important to note that "loca" can be a derogatory term. It can be used to insult someone or to imply that they are not mentally stable.
Overall, "su loca" is a phrase with multiple possible meanings, and its specific interpretation depends on the context.