Comprehensive resource for understanding and mastering English idioms
The idiom "sneak peek" refers to a secret or unofficial preview of something that is not yet publicly available or complete. It can also refer to a quick glimpse or preview of something, usually before it's officially launched or released. The word "sneak" implies that the viewing is surreptitious and that the person who is giving the sneak peek is trying to keep the event or thing they are showing a secret.
The word "sneak" has been used in English since the 16th century, and it means to move quietly or surreptitiously. The term "peek" comes from the Old French word "pecher," which means to look or see. The phrase "sneak peek" was first used in the United States in the 20th century and has become a popular idiom for describing a secret or unofficial preview of something.