/ ˈdʒɒbzwɜːθ; NAmE ˈdʒɑːbzwɜːrθ/ noun
( BrE , informal , disapproving ) a person who follows the rules of a job exactly, even when this causes problems for other people, or when the rules are not sensible
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WORD ORIGIN
1970s: from “it's more than my job's worth (not) to”.