Gif Central boasts hundreds of funny animated gifs. Only the best of the best make it onto this site, with most of them having an accompanying source. No tumblr-esque one-second-long disappointments. No obscure titles or descriptions.
This is an animated gif of the Terminator smiling. The awkward smile makes this gif hilarious. The Terminator was played by Arnold Schwarzenegger. This is from the second in the series (1991, believe it or not).