X is not amused is a LOLcat image macro series based on pictures of cats and pop icons looking profoundly unimpressed or even displeased.
Origin
While the exact date or origin source is unknown, the first instance is believed to be in January 2006, a strange picture of a cat stuck in a trash can surfaced on a Myspace subpage hosted by LazyBoy’s Underwear Goes Inside the Pants project.
Trivia
- The very first "X Is Not Amused" is also believed to be Limecat, aka Meloncat, an internet meme that's roots lead to a now invalid website "Limecat.net". Many have claimed Limecat to have existed in 2003 or 2004.