My parents emigrated from Aus/NZ just before I was born, so I inherited a bunch of weird down-under, outdated vocabulary.
“What are you fossicking around in the pantry for?” “Did you find a few skerrigs of chocolate?” “I need to use the dunny.” “That guy in car dealership was apoplectic.”
Lots of other turns of phrase, but - with the possible exception of “dunny” are legit words.
EDIT: OK. A few others, I still use ‘blasted’ as an adjective. If my kids do something ridiculous, “Jesus wept, child,” sometimes comes out of my mouth. Then a bunch of, “running around like a sprayed blowfly,” or, “wandering around like a lost soul.”
Fossicking and skerrig are related to mining activities, so may be more localized to areas were the gold rush was big. I confirmed they’re actual words.