The phrase "something irrelevant" is correct and usable in written English.
It is often used to refer to something that is not related or important to the current topic or discussion. Here is an example: "I was trying to have a serious conversation with my boss about my performance, but she kept bringing up something irrelevant like the weather."
The practice of embedding useful data in what looks like something irrelevant.
The NUS will no longer avoid policy on big educational issues in favour of policies on "something irrelevant", Tumelty says.
Because we were participating in this great historical event of a people returning after 2,000 years and building a new culture and new language and new society – it was so overwhelming that we regarded our past as something irrelevant.
It's time to stop shunning the world's biggest non-sporting event – watched by 180 million worldwide – as something irrelevant and instead starts treating it as an opportunity to shine.
If you can't explain the underlying theory, you are likely engaging in superstitious learning, and you may be copying something irrelevant or even damaging or only copying part (perhaps the worst part) of the practice.
We compulsively check our email in part because we don't know whether the next message will be for leisure/amusement, an overdue bill, a "to do", a query… something you can do now, later, something life-changing, something irrelevant.
Petraeus was asked to shepherd a disastrous war; his achievements are real and substantial, and shouldn't be obscured by something as irrelevant as an extramarital affair.
Above all, though, if you must complain about something as irrelevant as differences between books and screen adaptations, can you at least do it in private?
The BBC is so much bigger and greater than me standing here saying something as irrelevant as, 'I wouldn't have a career without it'.
Today the issue is back in the news again, which is fortunate, because if it wasn't, we'd be writing about something totally irrelevant.
He said something completely irrelevant about his daughter having a janitorial job when she was 13, and then made Mr. Williams' point for him by going on and on about how jobs are good for young people.
