from The Century Dictionary.
- noun A man who, for any reason, is living apart from his wife.
Sorry, no etymologies found.
Kensington while he himself continued his Eastern career as a grass-widower.
Some weeks ago he gave up his chambers in St. James's, and went to live with an actor friend, a grass-widower, who has a house in the St. John's Wood Road close by.
The Morals of Marcus Ordeyne : a Novel William John Locke 1896
He was then fifty years old, a grass-widower -- twice over -- and on the lookout for a wife.
Little Journeys to the Homes of the Great Philosophers, Volume 8 Elbert Hubbard 1885