The idiom "diamond in the rough" refers to someone or something that has great potential, but may not be immediately obvious. It can also refer to a situation that has challenges but is ultimately worth persevering through.

The idiom "I could eat a horse" means that someone is extremely hungry or famished. It is a figurative expression, as no one can actually eat an entire horse in one sitting.

"A drowning man will clutch at a straw" is an idiom that means a person who is in a dire situation and feels like they are on the brink of failure or collapse will desperately cling to any small hope, opportunity, or resource that may help them survive.

"Off the cuff" is an idiom that means something is done quickly, without prior planning or preparation. It can also refer to a spontaneous decision or action that is not well-thought-out or well-considered.

The idiom "ring fencing" means to create a physical or psychological barrier around something or someone, to protect it from external threats or influences.