I don't have a nickname per se, but one of my riding buddies and I call each other "Girlsteiner" which is a play off of Gerolsteiner's cycling team. We started using "Girlsteiner" as code for our, um, private parts when we went over a rough patch of road and it morphed from there. Silly, I know but it still cracks us up.

My non cycling nicknames are Kick (which is what I called myself when I was little) and Diddler, which morphed from Katydid (my real name is Kate) when I was in college. Try explaining that one!