* A metaphorical expression: It could be used metaphorically to describe something being divided or separated sharply. For example, "The argument sun-split the room, leaving two sides facing each other."
* A specific term: It's possible that "sun split" is a term used in a specific field or context. For example, it could refer to a phenomenon related to solar energy, like splitting sunlight into its component wavelengths.
* A misspelling: It's also possible that "sun split" is a misspelling of a different phrase.
To understand the intended meaning, you'll need more context. Please provide more information about where you encountered this phrase.
