I did what I could to keep up with the flow of the legal argument and various examples of precedent. Where it seemed to be heading was this: context isn’t enough, if you’re going to make a joke, make sure that you make it clear that a joke’s a joke – if you make it clear that a joke is a joke, then it is a joke. So, when saying something you regard as a joke, in order to avoid loss of job and life ruination, say “joke!”
Source : Guardian
Collected Reading 