not know beans
Also, not know the first thing; not know from nothing. Be ignorant about something, as in a poem published in the Yale Literary Magazine in 1855: “When our recent Tutor is heard to speak, This truth one certainly gleans, Whatever he knows of Euclid and Greek, In Latin he don't know beans.” The beans in this colloquial phrase, dating from the early 1800s, signify something small and worthless; not knowing the first thing about something clearly shows one doesn't know anything about it at all; and the third slangy phrase, with its double negative, implies stupidity as well as ignorance, as in Poor girl, just starting out and she doesn't know from nothing.
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How to use not know beans in a sentence
I don't know why or who's doing it, but it's the legacy…and it's a legacy that is so important to the culture.
They know they will face either a swift backlash or deafening silence.
What they say is, ‘We don’t approve of violence, but you know what?Bill Maher: Hundreds of Millions of Muslims Support Attack on ‘Charlie Hebdo’|Lloyd Grove|January 8, 2015|DAILY BEAST
No one seems to know who that is—or why they would want to do such a thing.
Scalise spoke briefly, adding little of substance, saying that the people back home know him best.
She is quite true, but not wise, and your left hand must not know what your right hand is doing.Checkmate|Joseph Sheridan Le Fanu
He came to the top of the stairs with a lamp in his hand, and wanted to know what the rumpus was about.The Bondboy|George W. (George Washington) Ogden
It seems very strange that I shall actually know Liszt at last, after hearing of him so many years.Music-Study in Germany|Amy Fay
Kind of a reception-room in there—guess I know a reception-room from a hole in the wall.
The policemen looked dull and heavy, as if never again would any one be criminal, and as if they had come to know it.Bella Donna|Robert Hichens