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 Jackée Harry rolling her head around while saying "Hello No!" In case you don't remember, she played the character Lisa Landry in the TV Sister Sister, which ran between 1994 and 1999.