For me, it's the insistance that I refer to whoever I'm dating as my "partner" or "lifepartner" or "significant other". What ever happened to the good old days of girlfriend and wife and lover? Gay, straight, doesn't matter.. why should the title differ? Two men could be each other's husband.. two woman can be each other's girlfriends or wives.. why split straws on something like this?
The other one I hate is "african america". This makes the assumption that all black folks are from africa (or descended from africa) and that all folks currently residing in America are Americans. My friend John is a black guy from England. His family came from Haiti. they don't call him a "Haitian Englander", and it drives him up the wall when he's lumped into the "African American" group when he's clearly not.
Lastly, I hate "Developmentally challenged". What ever happened to retarded? mentally impaired? mentally challenged? The terms change so often and I wish there was just one that everyone could stick to.