So you're looking for an offensive term that's not offensive. You want a term X such that you can offend a person by classifying him as X, but you don't want the term X to be a term that offends a certain class of people.
The general idea is - don't use [(non-value-judgment) terms that describe certain types of people] as value judgments. Trivial examples are: "bad" is okay, if somewhat anemic (!!! Wait, is that offensive? I'll leave it in in case anyone wants to address that question), because it's not identifying any particular group as "bad" except... "bad people". "Gay" should be discouraged, because it's basically saying "people who are gay are bad, so I am calling you gay to indicate that you are bad".
We're excited to have a second Phoenix meetup. As always, absolutely anyone is welcome. This time we'd like to change the location to the Barrett Honors College Dining Hall at ASU (It's extremely nice and has excellent food). I'll be there from 5 to 7 on Saturday and have a copy of Godel, Escher, Bach on the table.
The address is 698-798 Apache Blvd E, Tempe, AZ, and here it is on a map. The parking garage on Lemon is probably ideal, Barrett is south of that.
My phone number is 602-501-9420, feel free to call or text me.