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 political satirist Stephen Colbert pointing at a large sign that says "I told you so". This can be used as a reaction gif whenever you want to gloat about the fact that you were right.