Meaning and usage of the word reefer in English

The origin of the word "reefer" is interesting. In the mid-19th century, a "reefer" referred to a means of refrigeration, specifically a ship that carried perishable goods such as fruit and vegetables in insulated holds to keep them cool during long voyages. These ships, often called "reefers" or "reefers," played a crucial role in the global transportation of fresh produce. Over time, the term "reefer" also took on a slang meaning, particularly in the 1920s and 1930s among travelers and sailors. In this context, a "reefer" referred to a small amount of ornamental pruning or trimming done to a sailor's hair to make it look neat and tidy, often before a leave or vacation. This sense of the word is likely derived from the idea of a "reefer" being a means of "refining" or "preparing" one's appearance. The slang usage of "reefer" is no longer commonly used today, but it provides an interesting glimpse into the evolution of language.