plumber
 n.— «I was a flight engineer for two carriers while I waited for a flying position, and wore three stripes at both airlines. The slang aviation term “plumber” refers to a flight engineer.» —“Scrambled eggs on my hat” by Meryl Getline USA Today June 19, 2006. (source: Double-Tongued Dictionary)

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  1. Jim McManus says:

    Plumber is also a term used to refer to chemical engineers by chemists..

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