The idiom "go down in flames" means to fail or end up in a complete disaster. It's a figurative expression that refers to the sudden and total destruction of something, usually a person or an organization.

The idiom "ace up one's sleeve" means to have a secret advantage or hidden resource that one can use to gain an upper hand in a situation. It suggests having something that is not known to others and can be used as a surprise or an unexpected move.

"Pedal to the metal" is an idiom that means to give something or someone your full effort or attention, to work as hard as possible, or to go all out.

The idiom "stand your ground" is used to describe someone who stands firm in their beliefs or actions, even when faced with opposition or adversity. It can also refer to someone who is not afraid to fight for what they believe in or to defend themselves against harm.

The idiom "can't judge a book by its cover" means that one should not make judgments about something or someone based solely on their appearance or external characteristics.