lolcat

A photo of a cat doing a seemingly-innocuous thing, with large text superimposed. Sort of an offshoot of the orly owl. Also called cat macros

The phenomenon of pasting captions in large text onto pictures of cats. The captions are a specific blend of:

1) txt msg text (shortcuts like "ur" for "your")
2) bad English-Asian translations (like the classic "all your base are belong to us")
3) common typing mistakes (like "!!!!1" and "ZOMG" and "teh")
4) misspellings (like "cheeze")
5) spam shortcuts (like substituting "5" for "S" and "3" for "e")

Photographs of cats in compromising situations with captions describing the innermonologue of the pictured cat. The text is usually grammatically incorrect and relies on internet slang or "im" speak.

A humorous picture of a feline, accompanied with a witty caption intended to create laughter.

a cat that likes to lol

a series of cats photographed in any number of unfortunate or comedic happenings purely for our viewing pleasure with ill-spelt captions called LOLSpeak

An image macro of a member of the feline species, usually superimposed with phrases that make little to no grammatical sense whatsoever; some of the phrases are echoic of Black Slang, 1337 speak, or gamerchatter.