A skink as big as a human arm has been comically dubbed the Mega Chonk after its bones were found alongside other blasts from the prehistoric past.
After years of careful work, researchers from Flinders University have formally described what is by far the largest skink ever discovered.
Its official name is Tiliqua frangens, or Frangens for short.
But its bulky bod and serious spiky armour mean it already has a range of colourful nicknames including Mega Chonk and Chonkasaurus.
Palaeontologist Kailah Thorn reckons there's a chance it could break the internet.
"There's a bit of a meme trend around large 'chonky' animals with phrases like ‘oh lawd he/she comin’ associated with their arrival," she said.
"I'm keen to see what kind of memes come out when this animal is released on the world.
"It's going to be hilarious."
Dr Thorn, who studied fossils of the Frangens when she was completing her PhD, says it was truly impressive in terms of size - about a thousand times greater than most skinks.
It would have been similar in appearance to its closest living relative - the blue-tongued shingleback, or sleepy lizard - and existed about 50,000 years ago alongside other extinct megafauna including the marsupial lion and diprotodon.
Diana Fusco, from the university's palaeontology lab, says the mega skink's existence was carefully pieced together from bones unearthed at Wellington Caves in NSW and fossils already held in museums around Australia.
“In the dig at Wellington Caves, we started finding these spiked armoured plates that had surprisingly never been recorded before," she said.
"We knew we had something interesting and unique."
Dr Thorn said caves can be treasure troves when it comea to getting a handle on prehistoric biodiversity.
And that's certainly been true of Cathedral cave in the Wellington system, where Frangens bones continue to be found.
"There used to be a natural hole in the ceiling ... so there's marsupial lions and thylacines and stuff in there as well that have fallen in, or wandered in, and not been able to get out again," Dr Thorn said.
"It's a great way to sample biodiversity in a snapshot of time."
A paper about the Frangens has been published in the Royal Society's flagship biological research journal.
