I've seen alot of cool avitars, signatures, and screen names/handles, so whats does your _ mean?

Avitar: I like the weird look of my tux avitar
Sig: It is a song excerpt from one of my favorite crass songs
S/N: Well at first i was going to go with UnusedName or UnusedHandle or something similar because all of the good names are taken, but i thought it was kinda lame to have UnusedHandle so i guess the Unused just stuck...