gray hat

all hat and no cattle

Full of big talk but lacking action, power, or substance; pretentious.

all hat and no cowboy

Full of big talk but lacking action, power, or substance; pretentious.

black hat

A villain in a story, especially in a Western (a film or other work of the Western genre).

brick in one's hat

Drunkenness.

does the Pope wear a funny hat

Obviously! Rhetorical question in response to a question where the answer is an emphatic yes.

eat one's hat

Used in a result clause to express disbelief in a proposition expressed in a conditional clause.

get grey hair from

To acquire great frustration, confusion, or anxiousness from (something or someone).

give someone grey hair

To give someone great frustration, confusion, or anxiousness.