Not know beans about something

usgb
phrase

To have no knowledge, understanding, or competence in a particular subject or matter.

He doesn't know beans about running a business.
Visual representation of "not know beans about something" - To have no knowledge, understanding, or competence in a particular subject or matter

Often appears as...

  • doesn't know beans
  • don't know beans

Usage tips

Informal

Idiomatic

Definition 1 of 1
Visual representation of "not know beans about something"
LampPro Tip 1/3

American Slang

A casual, slang phrase in American English, often used in informal conversations.

Illustration for American Slang
My cousin doesn't know beans about fixing cars.
LampPro Tip 2/3

Emphasis on Ignorance

Used to stress someone's complete lack of knowledge on a subject, more than just a casual 'doesn’t know'.

Illustration for Emphasis on Ignorance
You're asking the wrong person; she doesn't know beans about politics.
LampPro Tip 3/3

Avoid in Formality

Not appropriate for formal or professional communications, like academic papers or business meetings.

Illustration for Avoid in Formality
In a job interview, avoid saying 'I don't know beans about this'.
Visual representation of the word "Not know beans about something"

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