Does Dude mean brother? As nouns the difference between dude and bro is that dude is (slang) a man while bro is (slang) brother; a male sibling.

Can brother be called as dude?

is that dude is (slang) a man while bro is (slang) brother; a male sibling.

Does dude mean a friend?

- Dude does not mean friend. It means simply, a male, man or boy. You can refer to someone as a dude, without even knowing them, or without ever having met them for example, whereas you would never (unless ironically) refer to someone you had never met as a friend, buddy or mate.