This is about a folk belief that my informant has about the notion of acknowledging something, and by acknowledgement causing the situation to change for the worse.
“The only superstition that I only kind of semi believe that I don’t believe at all, but if I were going to believe one this is the closest I come to believing one, is when you say something and acknowledge it you jinx it. Like, when Simon came with a new machine for the credit card, and he said “oh yeah it’s got bigger print and everything so you can read it”, and I said “oh but does it work?” And it didn’t work. Or you go outside and say it’s great weather and then it rains. It’s something about acknowledging it out loud and then all of a sudden it goes away. But I still don’t really believe that. But sometimes I actually don’t say something because I’m afraid if I say it then I will have jinxed it.”
Despite the informant’s protestations that she did not ascribe to this folk belief, she ascribes to it enough that she actively modifies her behavior in order to avoid its potential consequences. It’s expressing the idea that some things are simply too good to occur, and if one acknowledges it then the universe might pay attention and take it away, or perhaps that a stroke of good luck can be removed by acknowledging that one is having it. It’s almost a type of magic, wherein one acknowledges a reality and that acknowledgement will change the existence of that reality.