Talk Through One's Hat

make foolish statements<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

We were discussing ethnic traditions and customs with Fred the other day, and he showed just how little he knew about other cultures.

What do you mean?

Well, he said that as far as he could tell, there wasn’t much difference in behavior and temperament between the English and the Hispanics.

It’s plain to see that he was talking through his hat!

True, but Fred thinks he’s an authority o everything. It was difficult convince him that he was talking ignorantly. He’s got a reputation for making foolish, inaccurate statements.