I think we have had this thread before with some whacky results if I remember correctly. Now that there seem to be some newbies contributing it should prove enlightening. Mine is a combination of my nickname in the forces (forces nicknames could be the basis of another thread I suppose) "Bing" as my surname is Crosbie and my wife's name was "Laura". So I decimated both names and came up with Bingalau.
My full (forum) name is OTT_Buzzard. Derived from me quite liking Buzzards, and anyone who knows me, knows that I can be quite OTT at times. That said, I was considering a name change based around the same theme. Might do that sooner now!