Likewise. And, yet, I've thought about this for a while now and looked up a bunch of articles and I still think that "thing" is completely - if not more - appropriate.
I fully understand and use "think" as a noun - eg have a think - but when I say "you have another thing coming", there's no expectation or implication that they're going to rethink anything in the future. People often don't do that. Instead, I'm simply implying that reality is going to turn out to be very different (and probably negative/unfavourable for them) than they think/expect.
It's the equivalent of saying "watch out - youve got something else/other than you expect coming to you".
In fact, it even shifts the rethink from sometime in the future to now - "rethink this now, as it's not going to turn out how you expect" And, moreover, it's often said as a final warning "I'm doing you a favour right now by warning you - it's the only generosity you're going to get from me in this matter".
I fully understand and use "think" as a noun - eg have a think - but when I say "you have another thing coming", there's no expectation or implication that they're going to rethink anything in the future. People often don't do that. Instead, I'm simply implying that reality is going to turn out to be very different (and probably negative/unfavourable for them) than they think/expect.
It's the equivalent of saying "watch out - youve got something else/other than you expect coming to you".
In fact, it even shifts the rethink from sometime in the future to now - "rethink this now, as it's not going to turn out how you expect" And, moreover, it's often said as a final warning "I'm doing you a favour right now by warning you - it's the only generosity you're going to get from me in this matter".