just one of those things

Idioms  

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.

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Example Sentences

He suggested that the medical community had been fatalistic about elderly infections in the past, adding that "people have assumed it's just one of those things that happen in old age - in fact, we can do a lot about it".

From BBC

The Snapple glass bottles are just one of those things that scream 90s nostalgia.

From Salon

“It’s just one of those things where, you’ve just gotta keep going, man … So now, there’s just a different level of focus.”

From Los Angeles Times

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