Here's a breakdown of how it might be used:
* O.C. is often used as a shortened form of "obsessive-compulsive." While this can be a clinical diagnosis, it's also frequently used in a more casual way to describe someone who is very neat and organized.
* Clean in this context means being free of mess, clutter, and dirt.
So, "O.C. being clean" implies that someone is excessively tidy and organized, possibly to the point of being obsessive.
It's important to remember that the phrase can be used in a lighthearted way, but it's also important to be mindful of the potential for this phrase to be insensitive or offensive to those with actual obsessive-compulsive disorder.