Question

Talk through Your Hat to talk nonsense; to say something without really knowing what you're talking about

Accepted Answer

Don't let what Eric said upset you. He's just talking through his hat. The origin of this idiom is not clear. Some people think that if people really talked through their hats, they'd look ridiculous, like the nonsense they were saying. If people tell you that you're talking through your hat, they obviously don't have a high opinion of your words.

Idiom	Talk through Your Hat
Example	Don't let what Eric said upset you. He's just talking through his hat.
Meaning	to talk nonsense; to say something without really knowing what you're talking about
Origin	The origin of this idiom is not clear. Some people think that if people really talked through their hats, they'd look ridiculous, like the nonsense they were saying. If people tell you that you're talking through your hat, they obviously don't have a high opinion of your words.

Talking People Talk Hat Eric Upset Nonsense Knowing