From Wikipedia which, yes, can be manipulated, but there's plenty of other references out there, Urban Dictionary, Reddit, etc. No, you couldn't use any of those in a college paper, but this sure as f**k ain't Harvard.
Gee, says here that black people use the term mayo, so you must be black? Or a self loathing white?
https://en.wikipedia.org/wiki/List_of_ethnic_slurs