doesn't know beans

don't know beans

To know nothing or next to nothing. Don't ask me! I don't know beans about car engines.
See also: bean, know

doesn't know beans

Ignorance. The New England uncomplimentary description of a Bostonian who's so ignorant that he or she can't even cook the city's most famous dish of baked beans spread to the rest of the country.
See also: bean, know
References in periodicals archive ?
Yet, two years ago he got lucky on a big bull, and then, because he didn't have enough sense to know he doesn't know beans about writing, he wrote a story about that big bull--and we published it in Big Game Special 2002.
The consulting team's magician justifies his position by stating he doesn't have any preconceptions, which usually means he doesn't know beans about the problem.
Full browser ?