The most racially offensive memes have a “white mother” and “white” motif and are used to promote the concept of white supremacy, according to a new study.

White mothers have been used to portray their children as being “less white” or “less black” for years, according the National Association for the Advancement of Colored People, an advocacy group.

In 2016, for example, the National Urban League issued guidelines that included a list of “racial slurs” and suggested that parents should stop using the word “mother” in their child’s name.

White parents have also been used in racist memes, including one that said the phrase “white kids get it worse than black kids,” the AP reported.

But that particular meme was not widely used until 2017.

The AP asked the Association of American Publishers to look at more than 1,200 memes that appeared in the top 50 most popular images on Facebook during the 2017 holiday season.

The study, released Tuesday, found that white mothers were used in more than one-third of those images.

The top 10 memes included a meme that said “black mom is an idiot,” which has been shared more than 600,000 times, and a meme in which a black man said he would have “more babies than you motherfucking f***ing white woman.”

The study also found that “mothers in the US, particularly those who are black or Hispanic, have become increasingly racist.”

It said white mothers have also become more aggressive in their use of “mothering” and other phrases, including the “white girl” and the “black mother.”

In addition, the study found that the “mother in the middle” meme has become more common since 2016.

It featured a white woman who had children from two different fathers, one of whom was white.

The woman who has a white baby and a black mother used the phrase, “I know I’m not doing it right, but I am, and I’m gonna show you, I’m the one who deserves it.”

The AP also asked the association to review videos of white mothers talking to white people, to determine whether they were racially offensive.

The association declined.

The association is reviewing the findings and will report back to its members, according an Associated Press spokeswoman, Liz Mair.