I think a lot of these responses are valid but I believe that the ultimate litmus test for which word or expression is considered racist is in the eye of the POC. Ijeoma Oluo wrote in her book So You Want To Talk About Race that if a POC feels hurt or offended by a word or expression, who are we to say that what they are feeling is invalid? If I get second thoughts about skydiving and a friend jokes “don’t be yellow”, I am not offended. But if a stranger said the same thing, I would be offended. I know it can get complicated, but believe me, POC have to navigate this everyday. We can’t just use the excuse of freedom of expression so broadly. We all need to be more sensitive to the needs of others, especially if we don’t know what it’s like to live in their skin.