A Big Deal
Something so tiny it doesn’t even deserve to be called a problem. It’s like a pebble in your shoe, but even less annoying.
'My dog ate my homework.' 'So what? Big deal? It’s not even a big deal.'
She spilled coffee on her shirt. I said, 'So what? Big deal? Not even a big deal.'
He missed the bus. I said, 'So what? Big deal? Not even a big deal.'