The idiom "quantum leap" refers to a sudden and significant change or advancement that occurs at an unprecedented speed or level of innovation. It is often used to describe something that has the potential to revolutionize an industry, field, or society.

The idiom "queer pitch" is used to describe something that is unusual, strange, or bizarre. It can also be used to refer to a situation that is difficult to understand or navigate, or to an idea that seems unconventional or unorthodox.

The idiom "in cold blood" means to commit a crime or act of violence without any hesitation, intention, or remorse. It suggests that the person is calm and emotionless when carrying out such an action.

• He was in cold blood when he shot his wife.

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 "rocket science" is used to describe a subject or task that is extremely complex and difficult to understand, especially for someone who is not an expert in the field.