The following were results for an Ozwords Competition where entrants were asked to take an Australian colloquialism, alter it by only one letter, and supply a new and witty definition. You clearly need to be an Aussie to understand.
Billabonk: to make passionate love beside a waterhole.
Bludgie: a partner who doesn't work but is kept as a pet.
Dodgeridoo: a fake indigenous artefact.
Fair drinkum: good quality Aussie wine.
Flatypus: a cat that has been run over by a vehicle.
Mateshit: all your flat mate's belongings lying strewn around the floor.
Shagman: an unemployed male roaming the Australian bush in search of sexual activity.
Yabble: the unintelligible language of Australian freshwater crustaceans.
Bushwanker: a pretentious drongo who reckons he's above average when it comes to handling himself in the scrub.
Crackie daks: 'hipster' tracksuit pants.
Shornbag: a particularly attractive naked sheep
Interntional readers: just ask if you don't know what the 'root' word means
Aussie readers: feel free to add to the list