(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.

• add fuel to the flames
• add insult to injury
• add up
• add up to
• add up to something
• a dead duck
• a dead end
• a dead letter
• a dead ringer for
• a dead ringer for someone
• a dead ringer for something
• a dead weight
• a Dear John letter
• a death blow
• a death trap
• a designated driver
• a deus ex machina
• adhere to
• adhere to something
• ad hoc
• a diamond in the rough
• a different ball of wax
• a dime a dozen
• ad infinitum
• a dirty old man