The idiom "loose cannon" refers to someone who is unpredictable, unreliable, or too free-spirited. This person may behave in a way that is not appropriate or safe for themselves or others.

The idiom "dirt cheap" means an item or service that is very inexpensive, often to the point of being almost free. It can also imply that the item is of low quality or value.

The idiom "head over heels" is an English expression that means to be completely enamored or infatuated with someone or something. It can also mean being extremely emotional, passionate, or overwhelmed by a situation or task.

"As a matter of fact" is an idiomatic expression used to introduce a statement that is going to surprise or interest the listener. It can also be used to emphasize the truthfulness of what is about to be said.

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