What is the meaning of the idiom "A man of straw"?

A man with no means A generous man A man of character A man of no substance

A man of no substance

The correct answer is A man of no substance. The other options are: A man with no means : This is not the meaning of the idiom "a man of straw." A generous man : This is not the meaning of the idiom "a man of straw." A man of character : This is not the meaning of the idiom "a man of straw."