B.B.
We have done the same as a few others below. We call any undesirable words potty talk and the kids are welcome to use those words in the bathroom. Sometimes I hear my kids speaking their potty words while they are going potty, it is kind of funny to hear. I think doing it this way allows them to have some freedom of speech and allows me to control where it happens so I don't have to hear it all day and they aren't speaking these words in public...usually.