Meaning of the word "not know beans about" in English

What does "not know beans about" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

not know beans about

US /nɑt noʊ biːnz əˈbaʊt/
UK /nɒt nəʊ biːnz əˈbaʊt/
"not know beans about" picture

Idiom

to know nothing at all about a particular subject or situation

Example:
He claims to be an expert, but he doesn't know beans about quantum physics.
I don't know beans about how to fix a car engine.