be (not) a patch on

be (not) a patch on

To be just as good as someone or something else. Often used in the negative to emphasize someone or something's inadequacy. Primarily heard in UK, Australia. Alice is a patch on the lead actress in the school play, which is why she was chosen as the understudy. I loved my old boss—this new guy is not a patch on her.
See also: on, patch
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