List of Lol Cats according to Cheezburger Confidential.
HappycatThe happiest creature on the planet. 1337% happier than normal cats. Loves cheeseburgers and will ask you for one.
Dr. TinycatA tiny cat that is also a doctor. That's really all you need to know.
Ceiling CatFeline deity that watches us all from the infinite ceiling. Capable of miraculous deeds, but prefers a good nap.
Basement CatEvil black cat that resides in the basement of eternity. Known for eating souls and recruiting minions to do his evil deeds.
Hipster KittyA cat so obscure, it's hip. Last seen wearing an expensive vintage hoodie and growing a mustache.
LongcatThe longest cat known to exist. Longcat is unable to be measured with current cat measurment technology. Longcat is long.
Moral Grey Area KittehEthically ambiguous cat. Makes moral choices that are neither completely good or evil. Cat lawyer for hire.
Serious CatA cat capable of epic levels of seriousness. Has gone 2,632 days without cracking a smile. Current age: 2,632 days.
TacgnolMindless evil clone of Longcat. Created by Basement Cat to create havoc on the world. If seen, run for your life.
LolrusA giant seal that is fond of his little blue bucket. Bucket was stolen by a bad man. Lolrus has been searching for it ever since.
Monorail catRuns along on a track, and is frequently out of service.
Business CatKnown for making work Serious Buisness...when he isn't stopping to do cat stuff.
HovercatFlys along just over the ground, appears to have no legs due to the photo angle. Successor to Monorail Cat.
Groups, Organizations, Other
The Itteh Bitteh Kitteh CommittehSecret society of small kitties making sure that the world stays adorable. Like Fight Club only without fighting.
Real Cats Memes
Real cats that frequently show up on the Cheezburger site/in the memes, as well as other places online:
Grumpy CatReal name Tardar Sauce,has a type of feline dwarfism. Known for being even grumpier than Serious Cat. Hates everything.
Colonel Meow: Also known for grumpiness, due to his expression.
Lil BubFemale cat known for her distinctive face and perma-kitten appearance due to a genetic mutation.