I love these! More commonly referred to as slang, the definition of which is;
(n)A word or phrase that is not formal or literary and, is used in ordinary or familiar conversation.

We have some stellar ones down under; Crikey, Dunny, Drongo, Fair dinkum, the list goes on. I’ve seen some ripper merchandise with these (and their explanations) which I reckon make fabbo souvenirs.

If nothing else the use of these and, the conversations to explain them, are bloody entertaining! So have a crack, introduce your guests to some and get your giggle on!