Widow-Maker Meaning

(idiomatic) Something which or someone who takes the lives of men; a hazard that affects mostly men or is specific for some trade, occupied mostly by men.

Example: 1597, William Shakespeare, King John, act 5, sc. 2:
  O, it grieves my soul,
  That I must draw this metal from my side
  To be a widow-maker!
1906, Rudyard Kipling, "Harp Song of the Dane Women":
  What is a woman that you forsake her,
  And the hearth-fire and the home-acre,
  To go with the old grey Widow-maker?
1973, Peter F. Drucker, Management: tasks, responsibilities, practices, published 1999, page 316:
  Finally, jobs that are 'widow-makers' should be rethought and restructured. In the heyday of the great sailing ships, around 1850, just before the coming of steam, every shipping company had a widow-maker on its hands once in a while. ... One typical 'widow-maker' has been the job of international vice-president in the large American company.