The idiom "eager beaver" is used to describe someone who is extremely eager or enthusiastic about doing something, often to an excessive degree. It can also refer to someone who is highly diligent and hardworking, always ready to take on new tasks and responsibilities.

The idiom "nightmare dressed like a daydream" is used to describe something that seems like a dream or a pleasant fantasy, but turns out to be a nightmare. It suggests that an experience that started out as enjoyable or peaceful quickly turned into something unpleasant or frightening.

The idiom "keep at arm's length" means to maintain a distance or avoid close contact or intimacy. It can also mean to treat someone with caution or skepticism, or to keep a professional or formal relationship.

The idiom "a lot on my plate" means that someone has a lot of tasks, responsibilities, or obligations to fulfill. It can also imply that they are busy or occupied with various activities.

The idiom "code of conduct" refers to a set of rules or principles that govern behavior in a particular group, organization, or society.