Related Clues:

• Frat guy, perhaps
• Sis's sibling?
• Dude's kin
• Buddy, slangily
• Salutation akin to "dude"
• Dude's relative?
• Opposite of sis
• Family nickname, similar to sis
• Family nickname for brother, such as sis for sister
• Sis sibling, perhaps
• "Dawg!"
• 'Dawg!'
• Guy pal, informally
• Frat friend, maybe
• Frat bud