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 animated gif of a dog / bulldog looking incredibly tired before he just falls over and goes to sleep. This can be used as a reaction whenever somebody says something that bores the hell out of you.