(From the 1930 Sellar & Yeatman parody "1066 And All That") Something that can't possibly result in improvement of the subject. This term is always capitalised, as in "Replacing all of the 9600-baud modems with bicycle couriers would be a Bad Thing".
Opposite: Good Thing.
British correspondents confirm that Bad Thing and Good Thing (and probably therefore Right Thing and Wrong Thing) come from the book referenced in the etymology, which discusses rulers who were Good Kings but Bad Things. This has apparently created a mainstream idiom on the British side of the pond.
If you have a good experience with that person, then it is less likely you will label immigration a “bad thing” in a poll.
"I've got a huge uphill battle," she told Oprah, and it didn't sound like such a bad thing.
I don't know if that level of authenticity is a good thing or a bad thing for you guys.
From our point of view, would Cruz-as-nominee be a good or bad thing?
With so many different desserts to explore, the end of summer might not be such a bad thing after all.
I should not change, and listen, Hector—it would be a bad thing if I did!
Urquhart was a rich man, and to know that his lawyer was rich was no bad thing.
That was a bad thing for the Albemarle, for she never went out again.
"What's-the-use;" that's a bad thing to say, it plants worry seed.
"Well, it isn't a bad thing, some of it," I went on with pride and content.