Bruh is a slang term used to express surprise or disappointment. However, there are many other words that can be used in its place, depending on the context and tone of the conversation. For example, instead of saying "bruh," you could say "dude," "man," "bro," or "mate." These words are all casual and friendly, and can be used to convey a sense of camaraderie or understanding with the person you are speaking to. However, if you want to express frustration or annoyance, you might use more forceful words like "seriously," "come on," or "are you kidding me?" These words convey a different tone and can help to convey your emotions more effectively.