The term "noodle" instead of the "undefined term neutral" has been used by some members here on this board, and is not recognized in the electrical industry as a slang term.
I may be off base, but in all of my travels and years in this business, I have heard some really strange terms used to identify various types of electrical installations, such as "heavy up" and "rope" etc.
Trade slang is found here in case you are interested, I search alread and no Noodle there either:
http://www.tradeslang.com/ How would you define a neutral?