Green’s Dictionary of Slang

beat-up n.

(Aus.) an outrage; a highly negative criticism.

[Aus]R.G. Barrett White Shoes 94: The rest was a beat-up of how she was a rotten singer, model and actress all round.
[Aus]T. Winton Lockie Leonard: Scumbuster (1995) 118: ‘This [a demonstration] is a complete beat-up!’ shouted Mr Pustling at the cameras. ‘These people are the kind we should be very wary of. They frighten people for the sake of it.’.
[Aus]R.G. Barrett Goodoo Goodoo 57: There was a bit more beat-up about the incident.
[Aus]B. Matthews Intractable [ebook] [A]a sensationalised media beat-up at its best.