I couldn't give a flying monkey's arsehole

You're so fed up that you'd rather be hit by a flying monkey's butt than pay attention to whatever is happening.

My teacher asked me to write an essay. I said, 'I couldn't give a flying monkey's arsehole.'

My mom told me I had to clean my room. I said, 'I couldn't give a flying monkey's arsehole.'

My friend tried to convince me to go to a party. I said, 'I couldn't give a flying monkey's arsehole.'