brain is out of order

мозги отключились!

Is this the correct translation?

Well, if you just realized that your brain wasn't working properly, then yes. Your translation seems a perfect fit.

If it's been the case for a while now, then it's better to say:

мозги не работают - мозг не работает. And a bit of a idiomatic expression for you:

Голова (башка) не варит

Also you can replace мозги with голова or башка (a bit rude) in all examples above.

Quote:

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Originally Posted by iCake

Well, if you just realized that your brain wasn't working properly, then yes. Your translation seems a perfect fit.

If it's been the case for a while now, then it's better to say:

мозги не работают - мозг не работает. And a bit of a idiomatic expression for you:

Голова (башка) не варит

Also you can replace мозги with голова or башка (a bit rude) in all examples above.

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How it would be: I want to clean my head from all thoughts.

(Мне) хочется выкинуть все мысли из головы or (Я) хочу... It's better to not use я or мне, to my tastes at least. I also think you can substitute выкинуть with выбросить, the first is probably more common though.