(not) know beans about (something)

American & Australian, informal

to know nothing about something.

I don't know beans about computers - I've never even used one.

• mind of your own
• mind over matter
• Mind own business!
• mind p's and q's
• mind-reader
• Mind step.
• mind the store
• the top of the line
• the top of the tree
• the trouble with
• the trouble with someone
• the trouble with something
• the twilight zone
• the upper crust
• the villain of the piece
• the way things are
• the way things are going
• the wheel has come full circle.
• the wheel has turned full circle.
• the wheels are turning
• the whole ball of wax
• the whole bit
• the whole caboodle
• the whole enchilada
• the whole kaboodle