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general::
Phrase(s): It ’s just one of those things.
It is something that couldn’t have been prevented.; It is an unfortunate thing caused by fate. • I’m sorry, too. It’s not your fault. It’s just one of those things. • I feel terrible that I didn’t pass the bar exam. I guess it was just one of those things.
McGrawhill's American Idioms And Phrasal Verbs