Dipthong

A diphthong isn’t an Australian pub sport but one of those very odd nouns that hardly anyone knows but yet they all practice.

To wit, my mum says ‘pool’ as ‘poo-o-oo-l’. There are at least three different sounds in the ‘oo’, maybe more

Officially a dipthong is two adjacent vowel sounds occurring within the same syllable.

But some Australians just love pushing those boundaries past two.