I almost hate to post this, because every time I do it seems to be a threadkiller. That’s not my intent. I don’t want to ruin the fun. I love this stuff. Obviously this thread pops up frequently, so I sort of keep track of them to save Dopers the effort of re-entering their username explanations. If a lot of people reply to this OP, then this thread too will get added to the list.
If you have hours to kill, here are a number of threads dedicated to the topic of the meaning or origin of the Usernames selected by the Teeming Millions[sup]TM[/sup]… as follows…
[WARNING: Do NOT post to any of these old threads!!!]
How did you chose your username? (8-18-2000, 2 pages)
What does your Straight Dope nickname mean? (12-2-2000, 4 pages.)
Where’d you get your board name? (1-2-2001, 3 pages.)
Stupid User Names (1-6-2001, 3 pages)
What’s the story behind your username? (4-26-2001, 2 pages)
Your Literary Straight Dope Handle (8-5-2001, 2 pages.)
What does your name mean? (9-6-2001, 2 pages)
SDMB usernames - What’s the first thing you think of? (7-15-2002, 3 pages)
The “What’s the deal with your username?” Thread (7-16-2002, 3 pages)
Explain what your name means, and what you think we think it means (7-25-2002, 2 pages)
Explain your username! (1-23-2003, 5 pages)
Screen name significance? (3-28-2003, 2 pages)
So how did you pick your username? (5-26-2003, 3 pages)
Also, for fun, Doper [categorizing] Name Game (11-4-2001, 7 pages)
and similarly Have you noticed how much Evil… (more categorizing) (7-20-2003, 4 pages)
And, here is a recent thread about Doper name changes. Official Recordation of Name Change Thread