What type of humor would racist and sexist jokes be categorized into?

I did not major in literary studies so I do not readily recognize the nuances that are used to distinguish between the various concepts.

It doesn't seem to fit insult comedy since it is rarely told to members of the group it is insulting, nor heritage comedy since it generally refers to people of a different heritage. My first inclination is to lump it into the black comedy genre, however I'm not sure the intended purpose of such jokes meets this criteria listed on the Wikipedia page:

The purpose of black comedy is to make light of serious and often taboo subject matter; some comedians use it as a tool for exploring vulgar issues, thus provoking discomfort and serious thought as well as amusement in their audience.

Solution 1:

You could say those types of jokes are off-color humor:

Off-color Humor

• Humor that deals with topics that may be considered to be in poor taste or overly vulgar. Most commonly labeled as "off-color" are acts concerned with sex, a particular ethnic group, or gender.

• Other off-color topics include violence, particularly domestic abuse; excessive swearing or profanity; "toilet humor" / scatological humor; national superiority or inferiority, pedophilic content, and any topics generally considered impolite or indecent.

History

Off-color humor was used in Ancient Greek comedy, primarily by its most famous contributor and representative, Aristophanes. His work parodied some of the great tragedians of his time, especially Euripides, using sexual and excremental jokes that received great popularity among his contemporaries.

In the 1990's and modern era, comedians such as Bill Hicks, Doug Stanhope, and Dave Chappelle have used shocking content to draw attention to their criticism of social issues, especially censorship and the socioeconomic divide. Dave Attell and Louis C.K. are recognized as the modern masters of off-color humor that focuses on absurd topics. The cartoon Beavis and Butt-head was especially off-color in its early episodes, which included numerous depictions of animal cruelty. The highly praised television show South Park also popularized the use of offensive humor, for which the show has become infamous. The Aristocrats is perhaps the most famous dirty joke in the US and is certainly one of the best-known and most oft-repeated among comedians themselves. Tom Green has used shock humor in The Tom Green Show and the film Freddy Got Fingered, using outrageous stunts and jokes to draw an audience in.

[Wikipedia]

Solution 2:

This sort of humour is the opposite of politically correct, so would be classified as politically incorrect. It is sometimes used carefully and intelligently to point up the excesses of political correctness but its use is usually driven by prejudice and old fashioned attitudes.

Many old songs and pieces of comic writing were originally quite acceptable but have now become exceedingly offensive as the concept of political correctness has developed and at least one DJ has fallen foul of this by playing an old record containing the 'n' word.

Solution 3:

If you mean gags based on race or gender, then mostly the jokes themselves come from stereotype humour, which is extremely common. "BMW drivers are arrogant and selfish". "Scientists are socially awkward". "Blondes and Irish people are stupid". "Mothers-in-law are ugly". The jokes don't depend on the stereotype being true, but on it being widely known and recognised, and then accepted as if it were true for the purposes of the joke.

You're asking about stereotypes based on characteristics that relatively recently have been legally protected from discrimination. Many of us consider the stereotype to be too offensive to go without saying any more, and this affects how the stereotype impacts the audience even though we're still aware of it. Such a joke will fall flat because it reads (for example) as hostility towards Irish people, instead of as a witty way to exaggerate stupidity to the point of absurdity, or an amusing description of a particular piece of stupid behaviour. If the joke could be salvaged by replacing an Irish protagonist with the (non-Irish, non-blonde) teller, so that it's self-deprecating humour instead of racist, then was it a "true" racist joke, or was it just a racist way of telling a joke of some other type?

With an audience of such people, the joke can only work either if the stereotype is subverted somehow, or if the existence of the stereotype is criticised or perhaps reclaimed as part of the joke, or anyway that there is something going on that acknowledges the reason for using the offensive stereotype. I suspect that it's hard to categorise the humour without specifying what makes the new joke work, although quite likely the use of the stereotype will itself be ironic, and the joke will in part rest on the absurdity of maintaining the stereotype.

Then again, among those who feel the stereotype can still go without saying, even if when pressed they admit it's not literally true, the old situation still applies. It's still basic stereotype humour, perhaps gaining some additional power from the fact that using the now-deprecated stereotype is transgressive and therefore more incongruous (even if the audience expects it from a particular comedian) than if it was the 1970's and everyone was using it.

If someone makes a joke that contains some racist or sexist assumptions, then the result is probably a "racist joke" and/or a "sexist joke", but in terms of analysing the humour that might be incidental to the type of humour used. It could perhaps just be a simple pun on a slur term, in which case it's not stereotype humour at all, the type of humour is just "a pun". So I don't think you're going to find a phrase that precisely pins down what you're asking as a type of humour. Including every single racist and sexist joke, no matter what its structure, doesn't result in something that's a "type of humour" in a way that's particularly significant in terms of analysing how comedy works. But since "genre" can just mean a convenient term to match up a comedian with their target audience, you could perhaps file racist and sexist jokes told straight, under "politically incorrect humour". That would also include homophobia, ablism, and so forth.