Ari Shaffir is a US comedian, who recently recorded a Comedy Central special.
In it, he at one point mentions by full name another comedian, and then proceeds to attack her for being 'fat', 'annoying', and 'one-armed'.
None of what he says seems to have a punchline - he's just attacking a woman for shock value, and to appear 'edgy', though mocking a woman with a disability who isn't around to defend herself is about as 'edgy' as shooting fish in a barrel. It's cruel, witless and unfunny.
The comedian in question is Damienne Merlina.
She recorded a video response here.
I know the internet can be a cesspool of bad taste, but many of the comments on her video are truly beyond the pale.
Here's an example:
"Did fatty eat her own arm? You'd think with all that thick skin she could take a joke."
"Consider a career change (possibly a diet change too)"
"Some fat retarded bitch got offended by a comedian? What a surprise!"
Now, I defend Shaffir's right to talk about whatever he wants on stage. But I also defend the right of audiences and comedy club owners to say, "I hope you enjoyed telling that joke, because you won't ever be performing here again".
Freedom of speech is a two-way street.