Peculiar Expression is an IDIOM, which is a phrase or expression that has a figurative meaning that is different from its literal meaning. It is often used to express a sentiment or emotion in a creative way. Idioms are commonly used in everyday language and can be found in literature, music, and other forms of art. Peculiar Expression is an IDIOM that is used to describe something that is strange or unusual. It is often used to describe a situation or event that is out of the ordinary or unexpected.