just one of those things
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.
Words nearby just one of those things
just in time,
just intonation,
just like that,
just noticeable difference,
just now,
just one of those things,
just so,
just the same,
just the ticket,
just what the doctor ordered,
just-in-time