Well, mine's not really that interesting or creative. Randy is my first name, M is the first letter of my surname and is also the designation used by the U.S. armed forces for the M1911 .45 ACP sidearm. This is arguably the best known and most prolific example of firearms designer John A. Browning's genius. The 1911 was the standard-issue sidearm for the U.S. armed forces from 1911-1985. It's also one of my favorite handguns.
Well,, I have a bad mouth and cus a lot. So one of ex girl friends, friend nick named me phithy rotten. Playing off my full name Phil Rotenberry. I even had philthyrotten.com untillI got into a bit of trouble with the law.
I use the same handle on all the forums I hang at. A Commander112 is the airplane I own and fly in my avitar (1974 Rockwell Commander 112a Turbonormalized and intercooled).
I played tournament paintball for several years. One night during a little post tournament partying we gave each other nicknames. Mine namestarted out as Wingman, It was changed later that night to Wingnut.