done like dinner
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done like (a) dinner
Having failed or lost. Primarily heard in Australia. Your team will be done like dinner if they play against the all-star team. I just finished my paper, but class starts in five minutes, and the printer isn't working, so I'm done like a dinner.
done like (a) dinnerutterly defeated or outwitted. Australian & Canadian informal
1978 C. Green The Sun Is Up I had old Splinters Maloney the fishing inspector knocking on me door wanting to see me licence. Of course I was done like a dinner.