If someone calls you a name you do not like and make a big fuss about it. They can then see it bothers you. The best action you could take is to not get bothered by it then they may stop using it.
Sorry to say but very little the F-Mods can do about it. On the scale of things to report to F-Mods it's at the bottom of the list. There I nothing we can do. If we post it will make matters worse for you.
We all get called names we may not like but to let people know you don't like that is a green light for them to use it to cause upset or distress. Ignoring is the best option here.
Comprehensive Account Security