Back in the day I worked at a Marina, my boss called his mechanics "Wrenches". A customer was in the office asking about how to catch some bass, but nobody in the office did any fishing, so my boss said "I don't do any fishing but I have a wrench that fishes all the time, go back there and ask him". The guy (a good friend of mine now) walked back into the shop area and hollered, Which one of you is the fishinwrench? The next day they put that name on my time card and it just stuck.
The avitar is a proud symbol of a group of guys that I used to hang out with, used to talk to every day, and still love like family.