Rowdy

@Jane Wheelaghan imho, the whole cat meme universe started with I Can Haz Cheezburger, a web site that allowed you to upload funny pictures that anyone could caption. The special language that developed became classics, such as "dis how I dos it" "elebenty" "I can haz it?" I can't say that they coined LOL, but LOLCATS was adopted in their early days when referring to funny cats.

@Niki B Cry - Ditto!!

@Jordan Jeez, I'm not aware of any of that. What SHOULD the clue have been?