just one of those things

1. A random occurrence that can't be explained. For example, It wasn't their fault that the show failed; it was just one of those things. This expression was given greater currency as the title and refrain of one of Cole Porter's most popular songs (“Just One of Those Things,” 1935). [c. 1930] Also see one of those days.

Example Sentences

So we were sending ideas back and forth at one point, and it was just one of those things where I was like, “Man, I would love to hear Serj sing this. But I’m not sure it’s right for me.”

From Los Angeles Times

"As far as we knew, they had done everything right, and it was just one of those things," Mrs Holmes said.

From BBC

“I think it was just one of those things that, when it happened, it’s not really anything I’ve done,” he said.

From Los Angeles Times

“The kind of implausibility of Kennedy’s life ending so abruptly and so seemingly senselessly is just one of those things that just stays with you. And it’s obviously stayed with the country for 60 plus years,” Shaw said.

From Los Angeles Times

It's just one of those things unfortunately.

From BBC