This is an animated gif of a funny exchange between Val Kilmer and Robert Downey, Jr. in the movie Kiss Kiss Bang Bang, which was released back in 2005. The conversation goes like:
Perry van Shrike (Kilmer): Look up "idiot" in the dictionary. You know what you'll find?
Harry Lockhart (Downey, Jr.): A picture of me?
Perry van Shrike: No! The definition of the word "idiot". Which you fucking are!