British & Australian, informal if someone cannot do something for nuts, they cannot do it at all.
So Roger had prepared a beautiful meal? I thought you said he couldn't cook for nuts.
(redirected from can't for nuts)
can't (do something) for nuts
slang Is totally unable to do something. Primarily heard in UK, Australia. Oh, you'll definitely beat Sarah for that role in the musical—she's can't sing for nuts.