dinky-di

adjective4

1. •
   (Australia, slang) Genuine, true.

   • ‘Is that dinky-die?’ he asked. ‘You came on to Australia because of me?’ — 1950
2. •
   (Australia, slang) Authentically Australian.

   • “Wonderful! By the time we′re old I'll be able to speak like an Australian.” “No way. You′ll never be dinky die. Your English is much too cultured. Just like you.” — 2009
3. •
   (Australia, slang) Honest, on the level.

   • And if you want my dinky-die advice, you′ll let me take you to the cops. — 1959
4. •
   (Australia, slang) True blue, steadfastly loyal.

   • These men to whom I am referring are “dinky-die” diggers and patriots. — 1939