Banging Like A Dunny Door In A Thunderstorm Edit Meaning

1.

Having sexual relations vigorously.

'Oh man I saw the grossest thing last night.'

'Oh, dude, what happened?'

'I walked in on my room mate.'

'I bet that would have been spectacular.'

'Banging like a dunny door in a thunderstorm.'

See bonking, fucking, rooting, screwing, pounding