Anyone know what it actually is?

If you are in Australia: be aware - it might kill you.

Its a baby chinchilla. Probs...

A Russian hamster

I would say a pregnant mouse.

That's a White Russian dwarf hamster. They are super cute, but somewhat hard to find because they are often mixed with Cambells dwarf.

a floof

It's a fat ass rodent, you dumb piece of shit