Yep, that’s how Merriam Webster, Oxford and Cambridge define it. Not sure why anyone would think the Post got it wrong.
If I were to boil it down: the modern definition has been extended to include men who take perverse pleasure in knowing that, hearing, or seeing - other men have sex with their wives. Some big east coast mag just did an article on this. I guess given that many libs are insane, it makes sense that this would be a fun perversion for them.
I often wonder if Lindsey Graham enjoys being humiliated repeatedly and coming off like a door mat to Libtards. So even if one extends the definition to include the urban-slang version, it's still pretty accurate.
The link Fledermaus posted, is, as he warned, kinda gross. As in - Wish I could unread it - level gross.