An interweb sensation, it is the term for silly pictures of cats with subtitles. They are generally characterized by poor spelling and grammar, and for unknown reasons, tend to mention
cheese burgers often.
One reason for this may be that the (rumored) first lolcat
ever said "I can has Cheezburger?"
"hey! Did you see the lol catz with the Persian kitten?"
"The one that said 'you eated my cheezburger'? Yeah, it was funny
but what an ugly