Back in my Amiga days, it was cool to have a handle regardless if you were on a BBS or not.... I was originally "NightOwl" but then found someone in the UK had been using that for software development, so had to come up with something else.
Was on the floor in the lounge looking at my father's book collection, and saw "XPD" by Len Deighton - bingo.
And it stuck..... 30 years later still going.
Common meanings for it are "unexploded bomb" or "expedient demise" - the latter being associated with the book.
I'm AKA "D", "FiikDuck" "Demise" in various circles.







