The phrase "fair dinkum" means being honest, genuine, or truthful in Australian slang. It's a way of expressing sincerity and authenticity. Full definition
I'm a true blue fair dinkum Aussie larrakin from Down Under (or Australia, if you're not a fan of slang). (thecriticalcritics.com)
No trip to the «Territory» is complete without a visit to the Daly Waters Pub, an important watering hole for explorers and drovers in days gone by and now a great spot for a cold beer, a bit of history and a «fair dinkum outback experience»! (peterpans.com)
That's for two reasons, first because an 80 kg lighter F - Type with more power is news we can all celebrate, but also because it's our first chance to see how fair dinkum Jaguar's new Special Vehicle Operations is going to be. (ausmotive.com)