JazzSteampunk provides suggestions and optional rules for using Jazz with games set in a parallel Victorian era, or something very much like it. Social distinctions are important, and technology is a craft rather than a science. Machines are complex, ornate, and made by hand.
For primary descriptors, choose one word from Column 1, and one word from Column 2. For secondary descriptors, choose one from either column. Or make up your own descriptors (with the GM's permission).
Additionally, most steampunk characters should have a descriptor indicating their nationality (British, Hungarian, Japanese, etc.).