a bit how you goin
an Australian way to tell someone something is completely wrong and you're ready to fight about it
He said he could run a marathon. 'A bit how you goin?' I said. 'You can't even run to the fridge.'
My teacher gave me a pop quiz. 'A bit how you goin?' I said. 'I was sleeping!'
My brother said he was going to be rich. 'A bit how you goin?' I said. 'You're still wearing your pajamas!'