The idiom "foam at the mouth" means to be extremely angry or agitated, often to the point of losing control. It can also refer to a situation where there is a lot of excitement, enthusiasm, or eagerness.

The idiom "happy go lucky" is often used to describe someone who seems content with their life, regardless of what happens. They are typically optimistic, carefree, and don't worry too much about the future or past.

The idiom "kill the goose that lays the golden egg" is used to describe the situation where someone takes an action that destroys a valuable resource or opportunity. It is often used when someone has been successful and then loses everything because of their actions.

The idiom "fair-weather friend" refers to someone who is friendly and supportive only when things are going well or it's convenient. They tend to disappear or become distant when things get difficult or challenging.

The idiom "waiting time" refers to the amount of time a person has to wait before they receive something or someone they desire, such as a service or appointment, a return phone call or message, or a friend or family member.