give something up as a bad job
US /ɡɪv ˈsʌmθɪŋ ʌp əz ə bæd dʒɑb/
UK /ɡɪv ˈsʌmθɪŋ ʌp əz ə bæd dʒɑb/
1.
to stop trying to do something because you realize that you will never succeed
:
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After hours of trying to fix the old car, he decided to give it up as a bad job.
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I tried to teach her how to knit, but she just couldn't get the hang of it, so I had to give it up as a bad job.