When you've got a shit that's raring to go and you've got little chance of making it stop...
Aw, com'on mate, we have to find a loo, this shit's really banging on the door!
by AntD April 16, 2007
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james wanted to bang her back doors in ! im gonn bang your back doors in girl! would you like me to bang your back doors in tonight babe !whatch out James will bang your back doors in girl!
by hbabelicious July 10, 2008
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when a person has such incredible shaggin stamina they bang like a barn door in a twister, or on a very windy day.
kat: yo Adele i saw you get with those flat 1 guys last night ive heard they've got impressive pork swords but how was the shag?

Adele: i cant walk! those fuckers bang like a barn door!

kat: twister or windy day?

Adele: twister honey, twister

by E-blocka October 19, 2006
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Meaning a girl will fuck really hard. The “dunny” is Australian slang for a toilet/bathroom and historically these were outside of the house. The cyclone is the Southern Hemisphere’s version of a hurricane.
I reckon Paris Hilton would bang like a dunny door in a cyclone as fuck knows she has had enough practice mate!
by Displaced Aussie October 4, 2019
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'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.'
by theodore20 November 2, 2005
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A female who energically enjoys sex.
Taken from when most houses in England had outside toliets and a door that would slam shut in the wind.
"I'd like to get into Sarah's knickers, i bet she bangs like a shit house door!"
by Sammyseven November 12, 2006
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