bitzer

Unknown. Originally used of dogs. Perhaps from bits +‎ -er, in reference to the dog's composition from multiple different "bits". The spelling with tz may be influenced from other names of breeds (e.g. spitz, shih tzu, etc.) or in imitation of German names. Compare also German Betze (“bitch, female dog”).

bitzer (plural bitzers)

1. (Australia, New Zealand, informal) A mongrel dog.

   Synonym: mutt

2. (Australia, New Zealand, informal) A person of mixed race or ethnicity.
   • 2017, Fiona Farrell, Decline and Fall on Savage Street, →ISBN:

     And a bit Welsh on your father's side. And a bit Irish. There's even some Chinese in there. You're a bitzer, Stevie.