The term "bruh" is a slang expression typically used to convey a sense of disbelief, frustration, or surprise. It is often employed in informal contexts, especially among younger people. "Bruh" can also be used to refer to a friend or buddy in a casual manner, often when expressing exasperation or as an informal greeting.
The word "bruh" is derived from "bro," which is a short form of "brother." It became popular in internet culture and among youth slang, often used in memes and social media platforms.