fair dinkum

Are you fair dinkum?

2004, Susie Ashworth et al., Lonely Planet Australia, When people think of Australia they commonly think of the outback; or koalas, kangaroos and ‘fair dinkum’ frontier types.

He appreciated the honesty, he appreciated the fact that I rang him and was prepared to be fair dinkum with him, and he heard what I said.

2011, Annabel Stafford, The Mob Can't Hurt You, University of Technology, Sydney, The Life You Chose and That Chose You: The 25th UTS Writers' Anthology, unnumbered page, Well, then I've started fucken crying cause I'm fair dinkum scared the prick's gonna kill me. […] Fair dinkum, it sounds like the whole fucken town's out.