go to the wall

all dressed up and nowhere to go

Elaborately attired or otherwise fully prepared for an anticipated situation or activity which, nevertheless, fails to occur.

all systems go

Everything is ready.

as you go

While one is doing (something); as one progresses.

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.

boldly go where no man has gone before

To break new ground.