OC is a popular internet acronym, with several different meanings, depending on the context.
In most cases, especially online, “OC” means “Original Content”.
Another popular sense for the abbreviation is “Of Course” used in texting.
Alternatively, it may also mean “Original Character” when talking about the fictional characters of an author.
It is unclear, where exactly the acronym originates from, however, similar to most internet abbreviations, it started emerging in the late 1990’s and early 2000’s.
It was first defined on Urban Dictionary in 2003, with many other entries appearing since then.
With the rise of meme pages and social media platforms, “OC” became a frequently encountered acronym, especially on meme sites and meme groups on sites like Facebook.
In texting, “OC” is also widespread, with people using it as a quick confirmation.