idiom

It's not a standard idiom, but I take it to mean "I don't have any money at all."

Anonymousi have't got a bean

I've never heard it. Do you have a context?

Anonymousi have't got a bean

Hi,

This can refers to a lot of things. Like money (bean is a slang term for 100 dollars) , ecstasy pills or just to psychical energy.....

Like Philip said, you have to describe an context.

Where is "bean" a slang term for $100??

Grammar GeekWhere is "bean" a slang term for $100??

Look at urbandictionary.com.

http://www.urbandictionary.com/define.php?term=bean

Grammar GeekWhere is "bean" a slang term for $100??

Perhaps here:
---------
6. bean
31 up, 35 down

100 dollars. At least in Philly, anyway.

North Philly kid: "yo, I'll buy that bike off you for a bean fifty."

Well, North Philly is a world of its own. Even if it is only about 40 miles from where I sit typing this.

and north Philly is north Philadelphia I suppose. I was also thinking about Philippines.