Britfish
Someone who either has relatives, ancestory, or has lived in both Australia and England. Usually, they acquire a bit of both accents, which results in a way cool sounding accent. Also refers to the accent of which a Britfish person will have.
My friend was born in Australia but has British parents. She's such a Britfish.
Dude! Your accent is totally Britfish!
Dude! Your accent is totally Britfish!