Guey is a Mexican Spanish slang word, sometimes written as "wey" or "gue". It is often used as a friendly term between friends to refer to each other. However, it can also be used as an insult among strangers. There are various synonyms for the word "guey" in Mexican slang, such as "compa", "carnal", "pana", "amigo", "parcero", "camarada", "colega", and "hermano". Each of these synonyms has a similar meaning, which is a friend or a buddy. It's important to note that the usage of guey and its synonyms may vary depending on the region and the social group.