Possible Clues:

• Bro relative?
• 'Bro' alternative
• One much concerned with his appearance (informal)
• One stoner to another
• “Really, bro?”
• 'C'mon, man . . .'
• Slacker greeting
• Man expected to smuggle diamonds
• "Bruh!"
• 'The Big Lebowski' protagonist, with 'the'