Hashbaz is my battle.net (Starcraft) ID. It comes from Isaiah 8:3:
"And I went unto the prophetess; and she conceived, and bare a son. Then said the LORD to me, Call his name Maher-shalal-hash-baz."
The whole compound name means something like "hurry to the plunder", in reference to an impending attack by Assyria. I had a roommate who used to joke that he was going to have four sons one day, and name them Maher, Shalal, Hash, and Baz. The word sounds nice and zergy, and the meaning seemed appropriate for Starcraft. It's kind of become my default username, though I don't feel particularly attached to it.
Also I like its cross-compatibility with computer science: hash as in hash table, baz as in the standard sequence of dummy names "foo, bar, baz".