Apparently, twitter has been a-flutter after Ricky Gervais tweeted a series of jokes in which he plays with the word "mong." Previously, we dealt with profoundly mean-spirited, nasty, spiteful jokes about disability (Ofcom and About A Boy), but this has a different quality to it.
As I'm sure you all know, "mong" is a term of derision for people with mental retardation, especially people with Down Syndrome. The "stigmata" of Down Syndrome can include macroglossia (a big tongue, hence elegant impersonations that involve putting your tongue under your lower lip and going "nhhhuhhhh"), the rather more imaginatively-named "simian crease" ("get your simian crease off of me, you damned dirty ape"), and, of course, prominent epicanthal folds, which spurred the popularisation of the term "mongoloid", cleverly contracted to "mong". There is nothing affectionate or endearing about the word "mong"; it's a crass and pejorative diminutive of a weirdly racist characterisation of a feature associated with a number of conditions associated with mental retardation. A whole history of dismissive, contemptuous, belittling, and arrogantly misconstrued cruelty is captured in that term.