Har Har Har

A derivative form of "ha ha ha" (signifying laughter), usually used in one of two ironic contexts.

• As a response to an unfunny, tasteless, insulting, or offensive comment by someone else. The comment is offered in jest or as a joke, not as a serious insult; this is known to both. One would not respond with HarHarHar to a deliberate insult or slur.
• Pre-emptively, by the speaker of such a comment--often to signify that the comment is offered in jest. i.e. English is an easy language to learn--even Americans can learn it. HarHarHar

On Wiki, we can use HarHarHar as a WikiBadge to identify such a comment....