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 movie character Jeff Spicoli saying "Oh, gnarly!" This is from the movie Fast Times at Ridgemont High (1982). Believe it or not, the actor in question is actually a young Sean Penn.