Alright here's one.
"Yspaceicufo"
It's kinda cool, but kinda lame to me lol. It was on Need For Speed World (Which was a free online NFS game, it shut down last year forever though)
So, it's like this: Y-Spaceic-ufo.
The "Y" sounds like an Alien letter so that's why I chose it.
"Spaceic",kinda space-y.
And UFO means UFO.
My Username had to be the weirdest one on that site, if not, one of the weirdest usernames in internet history.
Some people called me "Ysp", some people called me "Space", it was very weird. It was a good game though, I miss it.