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The phrase "a cold day in hell" is an idiom used to express that something is extremely unlikely or improbable. While its precise origin is not documented, it has been in use since at least the early 20th century and is derived from the feelings of skepticism, doubt, or a sense of improbability.

The idiom "the last straw" is used to describe a situation or event that becomes the final and decisive factor leading to a particular outcome, often a negative or breaking point. It originates from the proverbial expression "the straw that broke the camel's back," which refers to the idea that a camel can carry a heavy load, but adding one more straw will cause it to collapse.

The origin of the idiom "lose one's cool" can be traced to American English slang from the mid-20th century. The term "cool" in this context refers to maintaining a calm, composed, and unruffled demeanor. It can be employed in personal relationships during arguments or conflicts when individuals become overwhelmed by their emotions and react impulsively. In professional settings, it may be used to describe moments of high stress or pressure, such as during presentations, meetings, or negotiations, when someone becomes visibly flustered or unable to maintain a calm demeanor.

The idiom "give one's right arm" likely stems from the idea that the right arm is typically associated with strength, skill, and dexterity, especially for right-handed individuals. Therefore, offering to give up one's right arm symbolizes an extreme sacrifice or willingness to give something of great personal value. This expression can be used in personal contexts, such as expressing one's willingness to make a significant sacrifice for a loved one or to achieve a lifelong dream. Additionally, it is commonly used in professional settings to highlight a person's strong dedication to their work or their willingness to go to great lengths to achieve success.

The idiom "head over heels" is believed to have originated in the 16th century. It is thought to be a reference to the idea of being so in love with someone that one is literally turned upside down. The phrase has been used in literature and popular culture for centuries, and it continues to be a popular way to describe being deeply in love. It conveys a sense of intense infatuation and overwhelming emotions, where one's thoughts and feelings are completely consumed by their love for the other person.

The idiom "neck and neck" likely originates from the world of horse racing, where it is crucial to measure the distances between horses at the finish line. When two horses are very close to each other, with their necks aligned, it signifies a close and competitive race with no clear leader. Over time, this horse racing terminology has been adopted into everyday language to describe any close competition or situation where two or more parties are evenly matched.

The idiom "on edge" has its origins in the early 17th century. The term "edge" refers to the sharp or thin boundary of a surface, and when used figuratively, it conveys the idea of being in a state of heightened sensitivity or alertness. It is commonly employed in both informal and formal settings to convey a sense of unease or tension. People may use this phrase to describe how they feel before a significant event, such as a job interview, public speaking engagement, or important performance. It is also used to express the general feeling of being on edge due to external factors like stressful situations, uncertain outcomes, or imminent threats.

The origin of the idiom "nose out of joint" can be traced back to the 17th century. The phrase was first recorded in the play "Hamlet" by William Shakespeare. This phrase is commonly used in various contexts to describe situations where someone feels offended, upset, or annoyed due to a perceived slight or a sense of being treated unfairly. It is often employed in interpersonal relationships, both personal and professional.