Wow, funny to see all those different nicknames... I've had a few too...

Badger - while I was still in the Corps had a 1stSgt call me Badger, small and
cute, but vicious when provoked

Motivated B@#ch on wheels - another one from the Corps

Milkbone - was on a call, went back out to the truck to get supplies and a
dog blindsided me and tried to have my thigh for dinner, my EMS
buddies call me milkbone and even came up with a safety kit for
me a, P.E.E.D.D - Paramedic Entry Exit Diversion Device, 2
milkbones in a ziplock with instructions to throw at dog and run
like crazy person. So my last nickname is "Kibbles" some RN's in
the ED have decided to call me that instead of milkbone. LOL

Milkbone so far is one that has stuck with a lot of people, heck I answer to it if they can't get my attention any other way