It means to clap them cheeks, get some ass. Used as a metaphor for Butt cheeks since they resemble dunes, thus you beat the Dunnies Down.
Yo I took your mom home last night and beat her Dunnies Down.
by DownAstronomical March 10, 2021
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A term used for someone that makes you not want to acknowledge their name for any of the following reasons:

a) You are not interested in their existence
b) You couldn't care less what their real name is
c) There are no other words to describe this person
d) They look like a Dunnie Dunnington
Jeremy: "Dunnie Dunnington, my office now!"
Dunnie: "My name's Martin.."
Jeremy: "You're fired."
by LordGryn December 22, 2011
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Make sure that carbie repair kit you get suits a VK dunny-dore.
by Zoist April 20, 2005
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The place where the Dunnie man take girls to.
She getting a one way ticket to Dunnie land in the back of the Dunnie van
by thejojo-ref-reference July 24, 2021
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A quick way of asking "Who's going to be there?" or "Who will be attending?"
Robert: "Wanna hit that party tonight?"
Adam: "Who dunnie?"
Robert: "No idea son, let's go find out."
by LordGryn December 22, 2011
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A blowfly. Named as such for their tendancies to hang around a dunny.

Another colourful Australian slang word.
by aussie April 4, 2004
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