run into a brick wall

back to the wall

A very difficult situation with no beneficial options available for action.

balls to the wall

With maximum effort or commitment.

bang one's head against a brick wall

To waste effort on a futile project.

blue wall of silence

Strict secretiveness maintained by the members of a police force with respect to information which might be contrary to their interests, especially information concerning questionable police actions.

break into a run

To start running.

break the fourth wall

To apparently communicate with reality directly, such as when characters of literature comment on the existence of a reader.

brick in

To enclose with bricks.

brick in one's hat

Drunkenness.