A Douglas Adams original, was used multiple times in his book "The Hitchhiker's Guide to the Galaxy". Usually (but not necessarily) following "a load of", dingo's kidneys means rubbish, bollucks, crap or bullshit.
Seriously? I have to give an example in a sentence? I can't just leave it blank? WTF?! That's a load of dingo's kidneys!
A return response to an Aussie mate (male) usually over a few beers who says something so outrageous that “fair dinkum” just doesn’t cut it.
Mate at pub: Went fishing, fell in the water, got attached by a shark, managed to get out of the water fairly unscathed and scored a root on the walk back to the Ute.