Well it is Aussie Slang day and this week we have these gems.
Banana Bender: Someone from Queensland
Cane Toad: Also someone from Queensland
Cockroach: Someone from New South Wales
Crow Eater: Someone from South Australia
Sandgroper: Someone from Western Australia
Jo-AnneRamplings 
Dearest Jo-Anne,
Well, here in the South they often use ‘make him/her eat crow’ but all others are unknown to me.
Hugs,
Mariette
I have also heard the saying and “eat crow” but never used it
Neither did I…