* * * * *
The etymology of this word is uncertain.*
Johnson says, "As it was anciently written gebrish, it is probably derived from the chymical [Chemical] cant, and originally implied the jargon of Geber [http://en.wikipedia.org/wiki/
*I don't think they needed to elucidate further, really.
ed. Note: I think this might also be one of those words, like "Gyp," which don't appear to modern users to be highly culturally insensitive until you realize it's foundation.